Exterior Lighting Standards
Standard | ||
|---|---|---|
Minimum on pavement2 | 0.2 footcandle | |
Maximum on pavement | 4.0 footcandle | |
Maximum at property line | 0 footcandle | |
Uniformity ratio Maximum: minimum3 | 20:1 | |
Minimum at 5 feet above pavement4 | 0.1 footcandle |
NOTES: | ||
|---|---|---|
1 | For typical conditions. During periods of non-use, the illuminance of certain parking facilities should be turned off or reduced to conserve energy. If reduced lighting is to be used only for the purpose of property security, it is desirable that the minimum (low point) value not be less than 0.1 footcandle. Reductions should not be applied to facilities subject to intermittent night use, such as at apartments, hospitals and transportation terminals. | |
2 | Measured on the parking surface, without any shadowing effect from parked vehicles or trees at points of measurement. | |
3 | The highest horizontal illuminance point at grade, divided by the lowest horizontal illuminance point or area should not be greater than the values shown. | |
4 | Measured at 1.5 meters (5.0 feet) above parking surface at the point of the lowest horizontal illuminance, excluding facing outward along boundaries. | |
Exterior Lighting Standards
Standard | ||
|---|---|---|
Minimum on pavement2 | 0.2 footcandle | |
Maximum on pavement | 4.0 footcandle | |
Maximum at property line | 0 footcandle | |
Uniformity ratio Maximum: minimum3 | 20:1 | |
Minimum at 5 feet above pavement4 | 0.1 footcandle |
NOTES: | ||
|---|---|---|
1 | For typical conditions. During periods of non-use, the illuminance of certain parking facilities should be turned off or reduced to conserve energy. If reduced lighting is to be used only for the purpose of property security, it is desirable that the minimum (low point) value not be less than 0.1 footcandle. Reductions should not be applied to facilities subject to intermittent night use, such as at apartments, hospitals and transportation terminals. | |
2 | Measured on the parking surface, without any shadowing effect from parked vehicles or trees at points of measurement. | |
3 | The highest horizontal illuminance point at grade, divided by the lowest horizontal illuminance point or area should not be greater than the values shown. | |
4 | Measured at 1.5 meters (5.0 feet) above parking surface at the point of the lowest horizontal illuminance, excluding facing outward along boundaries. | |