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Flood Light Application: Facade Lighting

When using ground mounted flood lights to light up a building facade, three factors must be considered:

  1. Setback Distance
  2. Fixture Spacing
  3. Aiming Height

Setback Distance

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.

Set back distance for facade lighting using flood lights

Fixture Spacing

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 light spacing for facade lighting

Aiming Height

Flood lights should be aimed at least 2/3 the height of the building.

Aiming Height = 2/3 x Building Height
2/3 x 30 ft. = 20 ft. high
Aiming height of flood light on facade application

Source: Lithonia Lighting

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