PDFWAC 51-11C-405062
Section C405.5.2—Exterior building lighting power.
C405.5.2 Total connected exterior building lighting power. The total exterior connected lighting power shall be the total maximum rated wattage of all exterior lighting that is powered through the energy service for the building.
EXCEPTION: | Lighting used for the following applications shall not be included: |
1. Lighting approved because of safety considerations; | |
2. Emergency lighting automatically off during normal business operation; | |
3. Exit signs; | |
4. Specialized signal, directional and marker lighting associated with transportation; | |
5. Advertising signage or directional signage; | |
6. Integral to equipment or instrumentation and is installed by its manufacturer; | |
7. Theatrical purposes, including performance, stage, film production and video production; | |
8. Athletic playing areas; | |
9. Temporary lighting; | |
10. Industrial production, material handling, transportation sites and associated storage areas; | |
11. Theme elements in theme/amusement parks; | |
12. Lighting integrated within or used to highlight features of art, public monuments and the national flag; | |
13. Lighting for water features and swimming pools; and | |
14. Lighting that is controlled from within dwelling units, where the lighting complies with Section R404.1. |
C405.5.3 Exterior lighting power allowance. The exterior lighting power allowance (watts) is calculated as follows:
1. Determine the Lighting Zone (LZ) for the building according to Table C405.5.3(1), unless otherwise specified by the code official.
2. For each exterior area that is to be illuminated by lighting that is powered through the energy service for the building, determine the applicable area type from Table C405.5.3(2). For area types not listed, select the area type that most closely represents the proposed use of the area. Covered parking garage lighting is not considered exterior lighting for the purposes of this calculation.
3. Determine the total area or length of each area type and multiply by the value for the area type in Table C405.5.3(2) to determine the lighting power (watts) allowed for each area type.
4. The total exterior lighting power allowance (watts) is the sum of the base site allowance determined according to Table C405.5.3(2), plus the watts from each area type.
C405.5.3.1 Additional exterior lighting power. Additional exterior lighting power allowances are available for the specific lighting applications listed in Table C405.5.3(3). These additional power allowances shall be used only for the luminaires serving these applications and shall not be used to increase any other lighting power allowance.
C405.5.4 Gas lighting. Gas-fired lighting appliances shall not be equipped with continuously burning pilot ignition systems.
[Statutory Authority: RCW 19.27A.020, 19.27A.025, 19.27A.160 and chapters 19.27A and 19.27 RCW. WSR 22-14-091, 23-12-101, and 23-20-021, § 51-11C-405062, filed 7/1/22, 6/7/23, and 9/25/23, effective 3/15/24. Statutory Authority: RCW 19.27A.020, 19.27A.025, 19.27A.160 and chapter 19.27 RCW. WSR 19-24-040, § 51-11C-405062, filed 11/26/19, effective 7/1/20. Statutory Authority: RCW 19.27A.025, 19.27A.160, and 19.27.074. WSR 16-03-072, § 51-11C-405062, filed 1/19/16, effective 7/1/16. Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-405062, filed 2/1/13, effective 7/1/13.]