DOT’s lighting-levels and uniformity guidelines are based on those established by the IES Roadway Lighting standard RP-8-22 (or more stringent where needed). DOT uses higher wattages on wide or commercial corridors and lower wattages on narrow or residential streets. DOT currently specifies 3000 Kelvin as the color temperature for all luminaires.
All street lighting designs must be approved by DOT Street Lighting Engineering Unit. Review Selection Criteria and Design Process for the latest Street Lighting and Signals Design Requirements.
Energy Standards & Bug Ratings
DOT Street Lighting evaluates LED luminaires as part of its specifications.
| |
Average Illuminance (fc) |
Illuminance Uniformity |
|---|
| Roadways |
|
|
| Collector* |
1.0 - 1.2 |
4:1 |
| Local** |
0.8 - 1.0 |
4:1 |
| Intersections |
|
|
| Collector/Collector |
2.0 - 2.5 |
4:1 |
| Collector/Local |
1.5 - 2.0 |
4:1 |
| Local/Local |
1.5 |
4:1 |
| Plazas, Under the El |
2.0 |
4:1 |
| Pedestrian Sidewalks |
0.6 - 0.8 |
Up to 6:1 |
| Shared Bikeways |
0.8 - 1.0 |
4:1 |
* DOT's Lighting Division generally classifies avenues and boulevards as collector roadways
**DOT's Lighting Division generally classifies cross streets as local roadways