3.9.2 Exterior Lighting

All exterior lighting applications shall be included in the model when the purpose is for green building ratings or Design to Earn ENERGY STAR. Exterior lighting is an optional input for the purpose of tax deductions. If an exterior lighting application is not connected to the building electricity meter, then it should not be included, e.g. street lighting or common area lighting.

The building descriptors that are described in this section apply separately to each lighting application; input for each building descriptor is provided for parking lot lighting, façade lighting, entry lighting, etc. Each lighting application is modeled as a separate system. Exterior lighting applications affect the electric load of the building but do not produce heat that would need to be removed by the building’s cooling system.

With ASHRAE Standard 90.1-2007, exterior lighting applications are grouped as tradable or non-tradable. Non-tradable lighting applications are use-it-or-lose-it categories such that the allowed power is the lesser of the power used for the proposed design or the allowed power.

  • Tradable applications include uncovered parking areas, building grounds, building entrances and exits, canopies and overhangs, and outdoor sales areas. Thus, the allowed lighting power density of these applications is multiplied by the associated area or length to yield the baseline power.
  • Non-tradable applications can only be used for the specific application and cannot be traded between applications or with other non-tradable applications such as building façades, automated teller machines, guardhouses, loading for law enforcement, drive through windows, or parking near retail. The allotment is in a use-it-or-lose-it format. Thus, the baseline power for these applications is the lesser of the wattage input for these applications or the product of the lighting power density for these applications and the area/length of these applications.
Exterior Lighting Name
Applicability All exterior lighting systems
Definition A name for the lighting system
Units Text, unique
Input Restrictions The name should be descriptive and provide a link to the construction documents.
Baseline Rules The baseline building should have a corresponding exterior lighting system that maps to the one in the proposed design. The name should be similar.
Exterior Lighting Category
Applicability All exterior lighting systems
Definition

A classification of each exterior lighting system from Table 9.4.5 in ASHRAE Standard 90.1-2007 or Table 9.3.2 in ASHRAE Standard 90.1-2001. This classification will determine the lighting power for the baseline building (see below). The lighting category establishes if the exterior lighting application is tradable or non-tradable under ASHRAE Standard 90.1-2007. Credit is offered for power reductions for tradable lighting applications, but not for non-tradable lighting applications.

The baseline standard and the associated User's Manual should be consulted for how to classify exterior lighting applications, however main entries shall provide access to the general public and shall not be used exclusively for staff or service personnel.”1 A couple of other clarifications are as follows:

Bikeways – treated as walkways

Outdoor dining – treated as plaza areas

One of the categories offered by the software should be “Lighting that is specifically designated as required by a health or life safety statute, ordinance, or regulation.” This lighting is specifically excluded by the baseline standards such that the baseline building lighting power is the same as the proposed design.

Units List (from Table 9.4.5 of ASHRAE Standard 90.1-2007) (from Table 9.3.2 of ASHRAE Standard 90.1-2001)
Input Restrictions The classification should accurately match the exterior lighting application in the rated building.
Baseline Rules Same as the proposed design
Exterior Lighting Area or Length
Applicability All exterior lighting systems
Definition

Each exterior lighting system application (see above) has an area or length associated with it. This area or length is a factor in determining the baseline building lighting power (see below). The following rules should be taken into account when calculating length or area:

  • Façade Illuminated area. Only areas of façade that are illuminated without obstruction are included in the illuminated area. 
  • If the lighted façade area exceeds exterior wall area or if door linear footage exceeds 25% of building perimeter, the software shall produce a warning.
  • Uncovered parking shall be calculated according to the rules for the parking portion of “Illuminated hardscape” from Title 24-2005. This definition accounts for the paved area that is within 3 times the luminaire mounting height of parking luminaires: “Illuminated area is defined as any area within a square pattern around each luminaire or pole that is six times the mounting height with the luminaire in the middle of the pattern less any area that is within a building, under a canopy, beyond property lines or obstructed by a sign or structure.”2
Units ft² or ft
Input Restrictions The area of the exterior lighting application should be determined using the rules in the baseline standard and the associated User's Manual.
Baseline Rules Same as the proposed design
Exterior Lighting Power
Applicability All exterior lighting systems
Definition The power used for the exterior lighting application. This power should include the lamp as well as the ballast.
Units W or W/ft²
Input Restrictions The lighting power should match the construction documents or the existing building being rated.
Baseline Rules

The exterior lighting power for the baseline building is determined from the product of the exterior lighting area or length and the allowed power for the exterior lighting category. The allowed power is determined from Table 9.4.5 in ASHRAE Standard 90.1-2007 or Table 9.3.2 in ASHRAE Standard 90.1-2001.

For non-tradable exterior lighting applications, the baseline building lighting power is the lesser of the lighting power for the proposed design application or the allowed power determined above.

Exterior Lighting Control
Applicability All exterior lighting systems
Definition

The means of controlling exterior lighting systems. The baseline standards required both daylight control and scheduling (e.g. a photocell and a standard time clock or an astronomical time clock). Additional controls could include:

  • Standard (as required by baseline standards)
  • Bi-level motion sensing controls3
  • On/off motion sensing control
  • Bi-level scheduling controls4
Units List (see above) along with an associated power adjustment factor (PAF) or schedule adjustment
Input Restrictions As designed. Documentation should be provided for lighting controls other than standard and evidence should be provided to support the reduction in lighting power (PAF) or the modification to the schedule.
Baseline Rules The baseline building shall have standard lighting controls, e.g. a photocell and standard time clock. No adjustment is made to either the baseline building exterior lighting power or the schedule
Exterior Lighting Schedule
Applicability All exterior lighting systems
Definition The exterior lighting schedule describes the fraction of installed connected lighting power that is operating for any given hour. The lighting schedule is a matrix of fractional values for each hour of the day and by day of week.
Units Data structure: schedule, fractional.
Input Restrictions

The default exterior lighting schedule shall be from dusk until 1 hour after the indoor lighting schedule drops below emergency lighting level (i.e. below 15%). Custom schedules may be created for atypical operating hours for exterior lighting systems. Each lighting system may operate on its own schedule. The default schedule shall be used when detailed information is unavailable.

The schedule may be modified when qualifying lighting controls are installed (see above).

Baseline Rules The schedule for the baseline building shall be the same as the proposed design unless the proposed design schedule is adjusted for qualifying lighting controls, in which case the unadjusted schedule is used for the baseline building.
  • 1. From CA T-24-2008 Table 147B
  • 2. 2005 T-24 T-24-2005 §147(c)1A
  • 3. A PG&E study of bi-level motion sensing lighting controls for an outdoor parking lot found that the lights operated at low output for 45% of the evening hours. Pacific Gas and Electric Company Bi-Level LED Parking Lot Lighting: Raley’s Supermarket West Sacramento, CA: February 2009 Emerging Technologies Program Application Assessment Report #0815 http://www.etcc-ca.com/images/stories/final20emerging20technology20report20for20led20parking20lot20lighting1.pdf
  • 4. For bi-level scheduling controls, one could turn off a fraction of the lights after interior lighting schedule dropped below 50% to indicate reduced lighting for after normal business hours or if parking lot lighting is within scope, reduced parking area that is illuminated during stocking, and other reduced activity periods.
90.1-2007

All exterior lighting applications shall be included in the model when the purpose is for green building ratings or Design to Earn ENERGY STAR. If an exterior lighting application is not connected to the building electricity meter, then it should not be included, e.g. street lighting or common area lighting.

The building descriptors that are described in this section apply separately to each lighting application; input for each building descriptor is provided for parking lot lighting, façade lighting, entry lighting, etc. Each lighting application is modeled as a separate system. Exterior lighting applications affect the electric load of the building but do not produce heat that would need to be removed by the building’s cooling system.

With ASHRAE Standard 90.1-2007, exterior lighting applications are grouped as tradable or non-tradable. Non-tradable lighting applications are use-it-or-lose-it categories such that the allowed power is the lesser of the power used for the proposed design or the allowed power.

  • Tradable applications include uncovered parking areas, building grounds, building entrances and exits, canopies and overhangs, and outdoor sales areas. Thus, the allowed lighting power density of these applications is multiplied by the associated area or length to yield the baseline power.
  • Non-tradable applications can only be used for the specific application and cannot be traded between applications or with other non-tradable applications such as building façades, automated teller machines, guardhouses, loading for law enforcement, drive through windows, or parking near retail. The allotment is in a use-it-or-lose-it format. Thus, the baseline power for these applications is the lesser of the wattage input for these applications or the product of the lighting power density for these applications and the area/length of these applications.
Exterior Lighting Name
Applicability All exterior lighting systems
Definition A name for the lighting system
Units Text, unique
Input Restrictions The name should be descriptive and provide a link to the construction documents.
Baseline Rules The baseline building should have a corresponding exterior lighting system that maps to the one in the proposed design. The name should be similar.
Exterior Lighting Category
Applicability All exterior lighting systems
Definition

A classification of each exterior lighting system from Table 9.4.5 in ASHRAE Standard 90.1-2007. This classification will determine the lighting power for the baseline building (see below). The lighting category establishes if the exterior lighting application is tradable or non-tradable under ASHRAE Standard 90.1-2007. Credit is offered for power reductions for tradable lighting applications, but not for non-tradable lighting applications.

The baseline standard and the associated User's Manual should be consulted for how to classify exterior lighting applications, however main entries shall provide access to the general public and shall not be used exclusively for staff or service personnel.”1 A couple of other clarifications are as follows:

  • Bikeways – treated as walkways
  • Outdoor dining – treated as plaza areas

One of the categories offered by the software should be “Lighting that is specifically designated as required by a health or life safety statute, ordinance, or regulation.” This lighting is specifically excluded by the baseline standards such that the baseline building lighting power is the same as the proposed design.

Units List (from Table 9.4.5 of ASHRAE Standard 90.1-2007)
Input Restrictions The classification should accurately match the exterior lighting application in the rated building.
Baseline Rules Same as the proposed design
Exterior Lighting Area or Length
Applicability All exterior lighting systems
Definition

Each exterior lighting system application (see above) has an area or length associated with it. This area or length is a factor in determining the baseline building lighting power (see below). The following rules should be taken into account when calculating length or area:

  • Façade Illuminated area. Only areas of façade that are illuminated without obstruction are included in the illuminated area. 
  • If the lighted façade area exceeds exterior wall area or if door linear footage exceeds 25% of building perimeter, the software shall produce a warning.
  • Uncovered parking shall be calculated according to the rules for the parking portion of “Illuminated hardscape” from Title 24-2005. This definition accounts for the paved area that is within 3 times the luminaire mounting height of parking luminaires: “Illuminated area is defined as any area within a square pattern around each luminaire or pole that is six times the mounting height with the luminaire in the middle of the pattern less any area that is within a building, under a canopy, beyond property lines or obstructed by a sign or structure.”2
Units ft² or ft
Input Restrictions The area of the exterior lighting application should be determined using the rules in the baseline standard and the associated User's Manual.
Baseline Rules Same as the proposed design
Exterior Lighting Power
Applicability All exterior lighting systems
Definition The power used for the exterior lighting application. This power should include the lamp as well as the ballast.
Units W or W/ft²
Input Restrictions The lighting power should match the construction documents or the existing building being rated.
Baseline Rules

The exterior lighting power for the baseline building is determined from the product of the exterior lighting area or length and the allowed power for the exterior lighting category. The allowed power is determined from Table 9.4.5 in ASHRAE Standard 90.1-2007.

For non-tradable exterior lighting applications, the baseline building lighting power is the lesser of the lighting power for the proposed design application or the allowed power determined above.

Exterior Lighting Control
Applicability All exterior lighting systems
Definition

The means of controlling exterior lighting systems. The baseline standards required both daylight control and scheduling (e.g. a photocell and a standard time clock or an astronomical time clock). Additional controls could include:

  • Standard (as required by baseline standards)
  • Bi-level motion sensing controls3
  • On/off motion sensing control
  • Bi-level scheduling controls4
Units List (see above) along with an associated power adjustment factor (PAF) or schedule adjustment
Input Restrictions As designed. Documentation should be provided for lighting controls other than standard and evidence should be provided to support the reduction in lighting power (PAF) or the modification to the schedule.
Baseline Rules The baseline building shall have standard lighting controls, e.g. a photocell and standard time clock. No adjustment is made to either the baseline building exterior lighting power or the schedule
Exterior Lighting Schedule
Applicability All exterior lighting systems
Definition The exterior lighting schedule describes the fraction of installed connected lighting power that is operating for any given hour. The lighting schedule is a matrix of fractional values for each hour of the day and by day of week.
Units Data structure: schedule, fractional.
Input Restrictions

The default exterior lighting schedule shall be from dusk until 1 hour after the indoor lighting schedule drops below emergency lighting level (i.e. below 15%). Custom schedules may be created for atypical operating hours for exterior lighting systems. Each lighting system may operate on its own schedule. The default schedule shall be used when detailed information is unavailable.

The schedule may be modified when qualifying lighting controls are installed (see above).

Baseline Rules The schedule for the baseline building shall be the same as the proposed design unless the proposed design schedule is adjusted for qualifying lighting controls, in which case the unadjusted schedule is used for the baseline building.
  • 1. From CA T-24-2008 Table 147B
  • 2. 2005 T-24 T-24-2005 §147(c)1A
  • 3. A PG&E study of bi-level motion sensing lighting controls for an outdoor parking lot found that the lights operated at low output for 45% of the evening hours. Pacific Gas and Electric Company Bi-Level LED Parking Lot Lighting: Raley’s Supermarket West Sacramento, CA: February 2009 Emerging Technologies Program Application Assessment Report #0815 http://www.etcc-ca.com/images/stories/final20emerging20technology20report20for20led20parking20lot20lighting1.pdf
  • 4. For bi-level scheduling controls, one could turn off a fraction of the lights after interior lighting schedule dropped below 50% to indicate reduced lighting for after normal business hours or if parking lot lighting is within scope, reduced parking area that is illuminated during stocking, and other reduced activity periods.
90.1-2010

All exterior lighting applications shall be included in the model when the purpose is for green building ratings or Design to Earn ENERGY STAR. If an exterior lighting application is not connected to the building electricity meter, then it should not be included, e.g. street lighting or common area lighting.

The building descriptors that are described in this section apply separately to each lighting application; input for each building descriptor is provided for parking lot lighting, façade lighting, entry lighting, etc. Each lighting application is modeled as a separate system. Exterior lighting applications affect the electric load of the building but do not produce heat that would need to be removed by the building’s cooling system.

With ASHRAE Standard 90.1-2007, exterior lighting applications are grouped as tradable or non-tradable. Non-tradable lighting applications are use-it-or-lose-it categories such that the allowed power is the lesser of the power used for the proposed design or the allowed power.

  • Tradable applications include uncovered parking areas, building grounds, building entrances and exits, canopies and overhangs, and outdoor sales areas. Thus, the allowed lighting power density of these applications is multiplied by the associated area or length to yield the baseline power.
  • Non-tradable applications can only be used for the specific application and cannot be traded between applications or with other non-tradable applications such as building façades, automated teller machines, guardhouses, loading for law enforcement, drive through windows, or parking near retail. The allotment is in a use-it-or-lose-it format. Thus, the baseline power for these applications is the lesser of the wattage input for these applications or the product of the lighting power density for these applications and the area/length of these applications.
Exterior Lighting Name
Applicability All exterior lighting systems
Definition A name for the lighting system
Units Text, unique
Input Restrictions The name should be descriptive and provide a link to the construction documents.
Baseline Rules The baseline building should have a corresponding exterior lighting system that maps to the one in the proposed design. The name should be similar.
Exterior Lighting Category
Applicability All exterior lighting systems
Definition

A classification of each exterior lighting system from Table 9.4.5 in ASHRAE Standard 90.1-2007. This classification will determine the lighting power for the baseline building (see below). The lighting category establishes if the exterior lighting application is tradable or non-tradable under ASHRAE Standard 90.1-2007. Credit is offered for power reductions for tradable lighting applications, but not for non-tradable lighting applications.

The baseline standard and the associated User's Manual should be consulted for how to classify exterior lighting applications, however main entries shall provide access to the general public and shall not be used exclusively for staff or service personnel.”1 A couple of other clarifications are as follows:

  • Bikeways – treated as walkways
  • Outdoor dining – treated as plaza areas

One of the categories offered by the software should be “Lighting that is specifically designated as required by a health or life safety statute, ordinance, or regulation.” This lighting is specifically excluded by the baseline standards such that the baseline building lighting power is the same as the proposed design.

Units List (from Table 9.4.5 of ASHRAE Standard 90.1-2007)
Input Restrictions The classification should accurately match the exterior lighting application in the rated building.
Baseline Rules Same as the proposed design
Exterior Lighting Area or Length
Applicability All exterior lighting systems
Definition

Each exterior lighting system application (see above) has an area or length associated with it. This area or length is a factor in determining the baseline building lighting power (see below). The following rules should be taken into account when calculating length or area:

  • Façade Illuminated area. Only areas of façade that are illuminated without obstruction are included in the illuminated area. 
  • If the lighted façade area exceeds exterior wall area or if door linear footage exceeds 25% of building perimeter, the software shall produce a warning.
  • Uncovered parking shall be calculated according to the rules for the parking portion of “Illuminated hardscape” from Title 24-2005. This definition accounts for the paved area that is within 3 times the luminaire mounting height of parking luminaires: “Illuminated area is defined as any area within a square pattern around each luminaire or pole that is six times the mounting height with the luminaire in the middle of the pattern less any area that is within a building, under a canopy, beyond property lines or obstructed by a sign or structure.”2
Units ft² or ft
Input Restrictions The area of the exterior lighting application should be determined using the rules in the baseline standard and the associated User's Manual.
Baseline Rules Same as the proposed design
Exterior Lighting Power
Applicability All exterior lighting systems
Definition The power used for the exterior lighting application. This power should include the lamp as well as the ballast.
Units W or W/ft²
Input Restrictions The lighting power should match the construction documents or the existing building being rated.
Baseline Rules

The exterior lighting power for the baseline building is determined from the product of the exterior lighting area or length and the allowed power for the exterior lighting category. The allowed power is determined from Table 9.4.5 in ASHRAE Standard 90.1-2007.

For non-tradable exterior lighting applications, the baseline building lighting power is the lesser of the lighting power for the proposed design application or the allowed power determined above.

Exterior Lighting Control
Applicability All exterior lighting systems
Definition

The means of controlling exterior lighting systems. The baseline standards required both daylight control and scheduling (e.g. a photocell and a standard time clock or an astronomical time clock). Additional controls could include:

  • Standard (as required by baseline standards)
  • Bi-level motion sensing controls3
  • On/off motion sensing control
  • Bi-level scheduling controls4
Units List (see above) along with an associated power adjustment factor (PAF) or schedule adjustment
Input Restrictions As designed. Documentation should be provided for lighting controls other than standard and evidence should be provided to support the reduction in lighting power (PAF) or the modification to the schedule.
Baseline Rules The baseline building shall have standard lighting controls, e.g. a photocell and standard time clock. No adjustment is made to either the baseline building exterior lighting power or the schedule
Exterior Lighting Schedule
Applicability All exterior lighting systems
Definition The exterior lighting schedule describes the fraction of installed connected lighting power that is operating for any given hour. The lighting schedule is a matrix of fractional values for each hour of the day and by day of week.
Units Data structure: schedule, fractional.
Input Restrictions

The default exterior lighting schedule shall be from dusk until 1 hour after the indoor lighting schedule drops below emergency lighting level (i.e. below 15%). Custom schedules may be created for atypical operating hours for exterior lighting systems. Each lighting system may operate on its own schedule. The default schedule shall be used when detailed information is unavailable.

The schedule may be modified when qualifying lighting controls are installed (see above).

Baseline Rules The schedule for the baseline building shall be the same as the proposed design unless the proposed design schedule is adjusted for qualifying lighting controls, in which case the unadjusted schedule is used for the baseline building.
  • 1. From CA T-24-2008 Table 147B
  • 2. 2005 T-24 T-24-2005 §147(c)1A
  • 3. A PG&E study of bi-level motion sensing lighting controls for an outdoor parking lot found that the lights operated at low output for 45% of the evening hours. Pacific Gas and Electric Company Bi-Level LED Parking Lot Lighting: Raley’s Supermarket West Sacramento, CA: February 2009 Emerging Technologies Program Application Assessment Report #0815 http://www.etcc-ca.com/images/stories/final20emerging20technology20report20for20led20parking20lot20lighting1.pdf
  • 4. For bi-level scheduling controls, one could turn off a fraction of the lights after interior lighting schedule dropped below 50% to indicate reduced lighting for after normal business hours or if parking lot lighting is within scope, reduced parking area that is illuminated during stocking, and other reduced activity periods.
90.1-2016 BM

All exterior lighting applications shall be included in the model. If an exterior lighting applications not connected to the building electricity meter should not be included, e.g. street lighting or common area lighting.

The building descriptors that are described in this section apply separately to each lighting application; input for each building descriptor is provided for parking lot lighting, façade lighting, entry lighting, etc. Each lighting application is modeled as a separate system. Exterior lighting applications affect the electric load of the building but do not produce heat that would need to be removed by the building’s cooling system.

Exterior lighting applications are grouped as tradable or non-tradable. Non-tradable lighting applications are use-it-or-lose-it categories such that the allowed power is the lesser of the power used for the proposed design or the allowed power.

  • Tradable applications include uncovered parking areas, building grounds, building entrances and exits, canopies and overhangs, and outdoor sales areas. Thus, the allowed lighting power density of these applications is multiplied by the associated area or length to yield the baseline power.
  • Non-tradable applications can only be used for the specific application and cannot be traded between applications or with other non-tradable applications such as building façades, automated teller machines, guardhouses, loading for law enforcement, drive through windows, or parking near 24-hour retail. The allotment is in a use-it-or-lose-it format. Thus, the baseline power for these applications is the esser of the wattage input for these applications or the product of the lighting power density for these applications and the area/length of these applications.

 

Exterior Lighting Name

Applicability

All exterior lighting systems

Definition

A name for the lighting system

Units

Text, unique

Input Restrictions

The name should be descriptive and provide a link to the construction documents.

Baseline Rules

The baseline building should have a corresponding exterior lighting system that maps to the one in the proposed design. The name should be similar.

 

Exterior Lighting Zones

Applicability

All exterior lighting systems

Definition

Five lighting zones are used in many standards for determining exterior lighting power allowance, but they are not applicable for the 90.1-2016 performance rating method. The zones are:

a. Zone 0 - Undeveloped areas within national parks, state parks, forest land, rural areas

b. Zone 1 - Developed areas of national parks, state parks, forest land, and rural areas

c. Zone 2 - Areas predominantly consisting of residential zoning, neighborhood business districts, light industrial with limited nighttime use, and residential mixed use areas

d. Zone 3 - All other areas

e. Zone 4 - High activity commercial districts in major metropolitan areas as designated by the local jurisdiction

Units

List (see above)

Input Restrictions

Not applicable.

Baseline Rules

Not applicable.

 

Exterior Lighting Category

Applicability

All exterior lighting systems

Definition

A classification of each exterior lighting system from Table G3.6 of ASHRAE Standard 90.1-2016. This classification determines the lighting power for the baseline exterior lighting system. The lighting category also establishes if the exterior lighting application is tradable or non-tradable. Credit is offered for power reductions for tradable lighting applications, but not for non-tradable lighting applications.

Units

List (from Table G3.6 of ASHRAE Standard 90.1-2016)

Input Restrictions

The classification should accurately match the exterior lighting application in the rated building.

Baseline Rules

Same as the proposed design

 

Exterior Lighting Area or Length

Applicability

All exterior lighting systems

Definition

Each exterior lighting category (see above) has an area or length associated with it. This area or length is a factor in determining the baseline building lighting power. The following rules should be taken into account when calculating length or area:

  • Façade Illuminated area. Only areas of façade that are illuminated without obstruction are included in the illuminated area. 
  • If the lighted façade area exceeds exterior wall area or if door linear footage exceeds 25% of building perimeter, the software shall produce a warning.
  • Only the lighted area of uncovered parking shall be included. Illuminated area is defined as any area within a square pattern around each luminaire or pole that is six times the mounting height  with the luminaire in the middle of the pattern less any area that is within a building, under a canopy, beyond property lines or obstructed by a sign or structure.

Units

ft² or ft

Input Restrictions

The area of the exterior lighting application should be determined using the rules above.

Baseline Rules

Same as the proposed design

 

Exterior Lighting Power

Applicability

All exterior lighting systems

Definition

The power used for the exterior lighting application. This power should include the lamp as well as the ballast. For the proposed building, this is referred to as the exterior installed lighting power (EILP), for the baseline building, this is referred to as the exterior lighting power allowance (ELPA).

Units

W or W/ft²

Input Restrictions

As designed. The EILP for the proposed design is determined by totaling the installed exterior lighting power for all proposed exterior luminaires that are not exempt from the exterior lighting requirements. (Refer to the section below for a list of exempt exterior lighting applications.)

Baseline Rules

The ELPA for all exterior building applications is the sum of the base site allowance plus the individual allowances for areas that are designed to be illuminated. NOTE: Automated software should display a warning if the ELPA is more than twice the EILP.

The ELPA is determined from the product of the exterior lighting area or length and the allowed power for the exterior lighting category. The allowed power is determined from Table 3.9.2-1

For non-tradable exterior lighting applications, the baseline building lighting power is the lesser of the lighting power for the proposed design application or the allowed power determined by these procedures. For tradeable exterior lighting applications, the lighting power shall be equal to the allowance in Table 3.9.2-1.

Table 3.9.2-1: Exterior Lighting Allowances

Exterior Lighting Category

Power Allowance (all lighting zones)

Tradable

 

 

Uncovered Parking Areas

Parking lots and drives

0.15 W/ft²

Building Grounds

Walkways less than 10 ft wide

1.0 W/ft

Walkways 10 ft wide or greater and Plaza areas

0.2 W/ft²

Special feature areas and Stairways

1.0 W/ft

Building Entrances and Exits

Main entries

30 W/ft of door width

Other doors

20 W/ft of door width

Canopies and Overhangs

Canopies (free standing and attached and overhangs)

1.25 W/ft²

Outdoor Sales

Open areas (including vehicle sales lots)

0.5 W/ft²

Street frontage for vehicle sales lots in addition to open-area allowance

20 W/ft

Nontradable

 

Building Facades

0.2 W/ft² for each illuminated wall or surface or 5.0 W/ft for each illuminated wall or surface length

Automated teller machines (ATMs) and night depositories

270 W per location plus 90 W per additional ATM per location

270 W per location plus 90 W per additional ATM per location

1.25 W/ft2 of uncovered area (covered areas are included in the “Canopies and Overhangs” section of “Tradable Surfaces”)

Loading areas for law enforcement, fire, ambulance and other emergency service vehicles

0.5 W/ft2 of uncovered area (covered areas are included in the “Canopies and Overhangs” section of “Tradable Surfaces”)

Drive-up windows at fast food restaurants

400 W per drive-through

Parking near 24-hour retail entrances

800 W per main entry

       

 

Non-Regulated Exterior Lighting Power Allowance

Applicability

All exterior lighting systems

Definition

Lighting used for the following exterior applications is exempt when equipped with a control device that complies with the requirements for exterior lighting control and is independent of the control of the nonexempt lighting. These are not required to be included in the total calculated exterior lighting power allowance.

a. Specialized signal, directional, and marker lighting associated with transportation

b. Advertising signage or directional signage

c. Lighting integral to equipment or instrumentation and installed by its manufacturer

d. Lighting for theatrical purposes, including performance, stage, film production, and video production

e. Lighting for athletic playing areas

f. Temporary lighting

g. Lighting for industrial production, material handling, transportation sites, and associated storage areas

h. Theme elements in theme/amusement parks

i. Lighting used to highlight features of public monuments and registered historic landmark structures or buildings

j. Lighting for hazardous locations

k. Lighting for swimming pools and water features

l. Searchlights

Units

W/ft² or watts

Input Restrictions

As designed. The exceptions to exterior lighting power allowance should be cross-referenced to the type of exception and to the construction documents.

Baseline Rules

Same as proposed design

 

Exterior Lighting Schedule

Applicability

All exterior lighting systems

Definition

The exterior lighting schedule describes the fraction of installed connected lighting power that is operating for any given hour. The lighting schedule is a matrix of fractional values for each hour of the day and by day of week.

Units

Data structure: schedule, fractional.

Input Restrictions

The default exterior lighting schedule shall be from dusk until 1 hour after the indoor lighting schedule drops below emergency lighting level (i.e. below 15%). Custom schedules may be created for atypical operating hours for exterior lighting systems. Each lighting system may operate on its own schedule. The default schedule shall be used when detailed information is unavailable. The schedule may be modified when qualifying lighting controls are installed (see above).

Baseline Rules

The schedule for the baseline building shall be the same as the proposed design. However, with approval of the rating authority, variations of the power requirements, schedules, or control sequences of the exterior lighting modeled in the baseline building from those in the proposed design shall be allowed by the rating authority based upon documentation that the exterior lighting installed in the proposed design represents a significant verifiable departure from documented conventional practice.

The burden of this documentation is to demonstrate that accepted conventional practice would result in baseline building exterior lighting different from that installed in the proposed design. If the baseline building’s exterior lighting differs from the proposed building, this input must be flagged and instructions given to provide the proper documentation.

NOTE: If exterior lighting loads/schedule for the baseline building differs from the proposed design, this needs to be flagged and reported in the compliance reports.

 

Exterior Lighting Control

Applicability

All exterior lighting systems

Definition

Exterior lighting controls are mandatory requirements for Standard 90.1-2016. Lighting for exterior applications shall meet the following requirements:

  1. Photocell or other device that shuts off lighting during daylight hours
  2. Automatic shut-off for building façade and landscape lighting between midnight or business closing, whichever is later, and 6 am or business opening, whichever comes first
  3. All other lighting shall be controlled by time switches that automatically reduce the connected lighting power by at least 30% for at least one of the following conditions
  4. From 12 midnight or within 1 hour of the end of business operations, whichever is later, until 6 am or business opening, whichever is earlier
  5. During any period when no activity has been detected for a time of no longer than 15 minutes

Exception: Lighting required for safety, security, or eye adaptation

Units

List: Photocell, Automatic Shut-Off, Time Switches

Input Restrictions

As designed, at a minimum meeting the above mandatory requirements

Baseline Rules

Same as proposed.

However, with approval of the rating authority, variations of the power requirements, schedules, or control sequences of the exterior lighting modeled in the baseline building from those in the proposed design shall be allowed based upon documentation that the exterior lighting installed in the proposed design represents a significant verifiable departure from documented conventional practice. The burden of this documentation is to demonstrate that accepted conventional practice would result in baseline building exterior lighting different from that installed in the proposed design. If baseline building’s exterior lighting differs from the proposed building, this input must be flagged and instructions given to provide the proper documentation.

NOTE: If exterior lighting loads or schedules for the baseline building differ from the proposed design, this needs to be flagged and reported in the compliance reports.

Building EQ

All exterior lighting applications shall be included in the model when the purpose is for green building ratings or Design to Earn ENERGY STAR. If an exterior lighting application is not connected to the building electricity meter, then it should not be included, e.g. street lighting or common area lighting.

The building descriptors that are described in this section apply separately to each lighting application; input for each building descriptor is provided for parking lot lighting, façade lighting, entry lighting, etc. Each lighting application is modeled as a separate system. Exterior lighting applications affect the electric load of the building but do not produce heat that would need to be removed by the building’s cooling system.

Exterior Lighting Name
Applicability All exterior lighting systems
Definition A name for the lighting system
Units Text, unique
Input Restrictions The name should be descriptive and provide a link to the construction documents.
Exterior Lighting Power
Applicability All exterior lighting systems
Definition The power used for the exterior lighting application. This power should include the lamp as well as the ballast.
Units W or W/ft²
Input Restrictions The lighting power should match the construction documents or the existing building being rated.
Exterior Lighting Control
Applicability All exterior lighting systems
Definition

The means of controlling exterior lighting systems. The baseline standards required both daylight control and scheduling (e.g. a photocell and a standard time clock or an astronomical time clock). Additional controls could include:

  • Standard (as required by baseline standards)
  • Bi-level motion sensing controls1
  • On/off motion sensing control
  • Bi-level scheduling controls2
Units List (see above) along with an associated power adjustment factor (PAF) or schedule adjustment
Input Restrictions As designed. Documentation should be provided for lighting controls other than standard and evidence should be provided to support the reduction in lighting power (PAF) or the modification to the schedule.
Exterior Lighting Schedule
Applicability All exterior lighting systems
Definition The exterior lighting schedule describes the fraction of installed connected lighting power that is operating for any given hour. The lighting schedule is a matrix of fractional values for each hour of the day and by day of week.
Units Data structure: schedule, fractional.
Input Restrictions

The default exterior lighting schedule shall be from dusk until 1 hour after the indoor lighting schedule drops below emergency lighting level (i.e. below 15%). Custom schedules may be created for atypical operating hours for exterior lighting systems. Each lighting system may operate on its own schedule. The default schedule shall be used when detailed information is unavailable.

The schedule may be modified when qualifying lighting controls are installed (see above).

  • 1. A PG&E study of bi-level motion sensing lighting controls for an outdoor parking lot found that the lights operated at low output for 45% of the evening hours. Pacific Gas and Electric Company Bi-Level LED Parking Lot Lighting: Raley’s Supermarket West Sacramento, CA: February 2009 Emerging Technologies Program Application Assessment Report #0815 http://www.etcc-ca.com/images/stories/final20emerging20technology20report20for20led20parking20lot20lighting1.pdf
  • 2. For bi-level scheduling controls, one could turn off a fraction of the lights after interior lighting schedule dropped below 50% to indicate reduced lighting for after normal business hours or if parking lot lighting is within scope, reduced parking area that is illuminated during stocking, and other reduced activity periods.
Energy Star

All exterior lighting applications shall be included in the model when the purpose is for green building ratings or Design to Earn ENERGY STAR. If an exterior lighting application is not connected to the building electricity meter, then it should not be included, e.g. street lighting or common area lighting.

The building descriptors that are described in this section apply separately to each lighting application; input for each building descriptor is provided for parking lot lighting, façade lighting, entry lighting, etc. Each lighting application is modeled as a separate system. Exterior lighting applications affect the electric load of the building but do not produce heat that would need to be removed by the building’s cooling system.

Exterior Lighting Name
Applicability All exterior lighting systems
Definition A name for the lighting system
Units Text, unique
Input Restrictions The name should be descriptive and provide a link to the construction documents.
Exterior Lighting Power
Applicability All exterior lighting systems
Definition The power used for the exterior lighting application. This power should include the lamp as well as the ballast.
Units W or W/ft²
Input Restrictions The lighting power should match the construction documents or the existing building being rated.
Exterior Lighting Control
Applicability All exterior lighting systems
Definition

The means of controlling exterior lighting systems. The baseline standards required both daylight control and scheduling (e.g. a photocell and a standard time clock or an astronomical time clock). Additional controls could include:

  • Standard (as required by baseline standards)
  • Bi-level motion sensing controls1
  • On/off motion sensing control
  • Bi-level scheduling controls2
Units List (see above) along with an associated power adjustment factor (PAF) or schedule adjustment
Input Restrictions As designed. Documentation should be provided for lighting controls other than standard and evidence should be provided to support the reduction in lighting power (PAF) or the modification to the schedule.
Exterior Lighting Schedule
Applicability All exterior lighting systems
Definition The exterior lighting schedule describes the fraction of installed connected lighting power that is operating for any given hour. The lighting schedule is a matrix of fractional values for each hour of the day and by day of week.
Units Data structure: schedule, fractional.
Input Restrictions

The default exterior lighting schedule shall be from dusk until 1 hour after the indoor lighting schedule drops below emergency lighting level (i.e. below 15%). Custom schedules may be created for atypical operating hours for exterior lighting systems. Each lighting system may operate on its own schedule. The default schedule shall be used when detailed information is unavailable.

The schedule may be modified when qualifying lighting controls are installed (see above).

  • 1. A PG&E study of bi-level motion sensing lighting controls for an outdoor parking lot found that the lights operated at low output for 45% of the evening hours. Pacific Gas and Electric Company Bi-Level LED Parking Lot Lighting: Raley’s Supermarket West Sacramento, CA: February 2009 Emerging Technologies Program Application Assessment Report #0815 http://www.etcc-ca.com/images/stories/final20emerging20technology20report20for20led20parking20lot20lighting1.pdf
  • 2. For bi-level scheduling controls, one could turn off a fraction of the lights after interior lighting schedule dropped below 50% to indicate reduced lighting for after normal business hours or if parking lot lighting is within scope, reduced parking area that is illuminated during stocking, and other reduced activity periods.