Flood Light Application: Facade Lighting
When using ground mounted flood lights to light up a building facade, three factors must be considered:
- Setback Distance
- Fixture Spacing
- Aiming Height
Install fixtures back, "setback", 3/4 times the building height.
Setback Distance = 3/4 x Building Height
3/4 x 30 ft. = 22.5 ft.
When spacing fixtures out, do not exceed two times the setback distance.
Fixture Spacing = 2 x Setback Distance
2 x 22.5 ft. = 45 ft. apart
Flood lights should be aimed at least 2/3 the height of the building.
2/3 x 30 ft. = 20 ft. high
Source: Lithonia Lighting