Statutes, codes, and regulations
Washington Administrative Code
Title 51 - Enterprise Services, Department of (Building Code Council)
Chapter 51-11C - State Building Code adoption and amendment of the 2021 edition of the International Energy Conservation Code, Commercial
Section 51-11C-405062 - Section C405.5.2-Exterior building lighting power

Wash. Admin. Code § 51-11C-405062

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Current through Register Vol. 25-01, January 1, 2025
Section 51-11C-405062 - Section C405.5.2-Exterior building lighting power
C405.5.2Total 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.

C405.5.3Exterior 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.
C405.5.3.1Additional 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.
C405.5.4Gas lighting. Gas-fired lighting appliances shall not be equipped with continuously burning pilot ignition systems.

Wash. Admin. Code § 51-11C-405062

Amended by WSR 16-03-072, Filed 1/19/2016, effective 7/1/2016
Amended by WSR 19-24-040, Filed 11/26/2019, effective 7/1/2020
Amended by WSR 22-14-091, Filed 7/1/2022, effective 7/1/2023

Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. 13-04-056, § 51-11C-405062, filed 2/1/13, effective 7/1/13.