// CODE SNIPPET
C405.4 Exterior Lighting Power Requirements (Mandatory)
JUMP TO FULL CODE CHAPTER
The total connected exterior lighting power calculated in accordance with Section C405.4.1 shall be not greater than the exterior lighting power allowance calculated in accordance with Section C405.4.2.
The total exterior connected lighting power shall be the total maximum rated wattage of all lighting that is powered through the energy service for the building.
Exception: Lighting used for the following applications shall not be included.
- Lighting approved because of safety considerations.
- Emergency lighting automatically off during normal business operation.
- Exit signs.
- Specialized signal, directional and marker lighting associated with transportation.
- Advertising signage or directional signage.
- Integral to equipment or instrumentation and installed by its manufacturer.
- Theatrical purposes, including performance, stage, film production and video production.
- Athletic playing areas.
- Temporary lighting.
- Industrial production, material handling, transportation sites and associated storage areas.
- Theme elements in theme/amusement parks.
- Used to highlight features of art, public monuments, and the national flag.
- Lighting for water features and swimming pools.
- Lighting controlled from within dwelling units, where the lighting complies with Section R404.1.
The total exterior lighting power allowance is the sum of the base site allowance plus the individual allowances for areas that are to be illuminated by lighting that is powered through the energy service for the building. Lighting power allowances are as specified in Table C405.4.2(2). The lighting zone for the building exterior is determined in accordance with Table C405.4.2(1) unless otherwise specified by the code official.
EXTERIOR LIGHTING ZONES
| LIGHTING ZONE | DESCRIPTION |
| 1 | Developed areas of national parks, state parks, forest land, and rural areas |
| 2 | Areas predominantly consisting of residential zoning, neighborhood business districts, light industrial with limited nighttime use and residential mixed-use areas |
| 3 | All other areas not classified as lighting zone 1, 2 or 4 |
| 4 | High-activity commercial districts in major metropolitan areas as designated by the local land use planning authority |
LIGHTING POWER ALLOWANCES FOR BUILDING EXTERIORS
| LIGHTING ZONES | |||||
| Zone 1 | Zone 2 | Zone 3 | Zone 4 | ||
| Base Site Allowance | 350 W | 400 W | 500 W | 900 W | |
| Uncovered Parking Areas | |||||
| Parking areas and drives | 0.03W/ft2 | 0.04 W/ft2 | 0.06 W/ft2 | 0.08 W/ft2 | |
| Building Grounds | |||||
| Walkways and ramps less
than 10 feet wide
|
0.5 W/linear foot | 0.5 W/linear foot | 0.6 W/linear foot | 0.7 W/linear foot | |
| Walkways and ramps 10
feet wide or greater,
plaza areas, special
feature areas
|
0.10 W/ft2 | 0.10 W/ft2 | 0.11 W/ft2 | 0.14 W/ft2 | |
| Dining areas | 0.65 W/ft2 | 0.65 W/ft2 | 0.75 W/ft2 | 0.95 W/ft2 | |
| Stairways | 0.6 W/ft2 | 0.7 W/ft2 | 0.7 W/ft2 | 0.7 W/ft2 | |
| Pedestrian tunnels | 0.12 W/ft2 | 0.12 W/ft2 | 0.14 W/ft2 | 0.21 W/ft2 | |
| Landscaping | 0.03 W/ft2 | 0.04 W/ft2 | 0.04 W/ft2 | 0.04 W/ft2 | |
| Building Entrances and Exits | |||||
| Pedestrian and vehicular
entrances and exits
|
14 W/linear foot
of opening
|
14 W/linear foot
of opening
|
21 W/linear foot
of opening
|
21 W/linear foot
of opening
|
|
| Entry canopies | 0.20 W/ft2 | 0.25 W/ft2 | 0.4 W/ft2 | 0.4 W/ft2 | |
| Loading docks | 0.35 W/ft2 | 0.35 W/ft2 | 0.35 W/ft2 | 0.35 W/ft2 | |
| Sales Canopies | |||||
| Free-standing and
attached
|
0.40 W/ft2 | 0.40 W/ft2 | 0.6 W/ft2 | 0.7 W/ft2 | |
| Outdoor Sales | |||||
| Open areas (including
vehicle sales lots)
|
0.20 W/ft2 | 0.20 W/ft2 | 0.35 W/ft2 | 0.50 W/ft2 | |
| Street frontage for
vehicle sales lots in
addition to "open area"
allowance
|
No allowance | 7 W/linear foot | 7 W/linear foot | 21 W/linear foot | |
For SI: 1 foot = 304.8 mm, 1 watt per square foot = W/0.0929 m2.
W = watts.
INDIVIDUAL LIGHTING POWER ALLOWANCES FOR BUILDING EXTERIORS
| LIGHTING ZONES | ||||
| Zone 1 | Zone 2 | Zone 3 | Zone 4 | |
| Building facades | No allowance | 0.075 W/ft2 of gross above-grade wall area | 0.113 W/ft2 of gross above-grade wall area | 0.15 W/ft2 of gross above-grade wall area |
| Automated teller machines (ATM) and night depositories | 135 W per location plus 45 W per additional ATM per location | |||
| Uncovered entrances and gatehouse inspection stations at guarded facilities | 0.5 W/ft2 of area | |||
| Uncovered loading areas for law enforcement, fire, ambulance and other emergency service vehicles | 0.35 W/ft2 of area | |||
| Drive-up windows and doors | 200 W per drive through | |||
| Parking near 24-hour retail entrances. | 400 W per main entry | |||
For SI: 1 watt per square foot = W/0.0929 m2.
W = watts.
Any increase in the exterior lighting power allowance is limited to the specific lighting applications indicated in Table C405.4.2(3). The additional power shall be used only for the luminaires that are serving these applications and shall not be used for any other purpose.
Gas-fired lighting appliances shall not be equipped with continuously burning pilot ignition systems.
Related Code Sections
C405.4 [CE] Commercial Energy Efficiency, Exterior Lighting Power Requirements (Mandatory)
The total connected exterior lighting power calculated in accordance with Section C405.4.1 shall be not greater than the exterior lighting power ...
Energy Conservation Code 2018 of Colorado > 4 [CE] Commercial Energy Efficiency > C405 Electrical Power and Lighting Systems > C405.4 Exterior Lighting Power Requirements (Mandatory)
C405.5 [CE] Commercial Energy Efficiency, Exterior Lighting (Mandatory)
Where the power for exterior lighting is supplied through the energy service to the building, all exterior lighting shall comply with Section ...
Energy Conservation Code 2015 of Colorado > 4 [CE] Commercial Energy Efficiency > C405 Electrical Power and Lighting Systems > C405.5 Exterior Lighting (Mandatory)
C405.1 [CE] Commercial Energy Efficiency, General (Mandatory)
This section covers lighting system controls, the maximum lighting power for interior and exterior applications and electrical energy consumption ...
Energy Conservation Code 2015 of Colorado > 4 [CE] Commercial Energy Efficiency > C405 Electrical Power and Lighting Systems > C405.1 General (Mandatory)
C405.2.5 [CE] Commercial Energy Efficiency, Exterior Lighting Controls
Lighting for exterior applications other than emergency lighting that is intended to be automatically off during building operation, lighting ...
Energy Conservation Code 2015 of Colorado > 4 [CE] Commercial Energy Efficiency > C405 Electrical Power and Lighting Systems > C405.2 Lighting Controls (Mandatory) > C405.2.5 Exterior Lighting Controls
C405.2 [CE] Commercial Energy Efficiency, Lighting Controls (Mandatory)
are not required to have light reduction control: 2.1. Spaces that have only one luminaire with a rated power of less than 100 watts. 2.2. Spaces that use ...
Energy Conservation Code 2018 of Colorado > 4 [CE] Commercial Energy Efficiency > C405 Electrical Power and Lighting Systems > C405.2 Lighting Controls (Mandatory)