| Sign Lighting |
When lighting a sign with ground-mounted floodlights, there are three considerations:
When using ground-mounted floodlights to light a sign, the recommended setback is a distance equal to 3/4 the sign height. For example, the setback distance for a 12 foot by 6 foot sign would be 4.5 feet. Locating the floodlight closer will sacrifice uniformity while setting it farther back will result in a loss of efficiency.
Setback distance = 3/4 x sign height
3/4 ( 6 ft.) = 4.5 ft.
The rule of thumb for spacing floodlights is not to exceed two times the setback distance. If the setback is 4.5 feet, the floodlights should not be placed more than 9 feet apart.
Spacing = 2 x setback distance
4.5 ft. x 2 = 9 ft. apart
The floodlight should be aimed at least 2/3 up the sign. For example, if a sign is six feet tall, then the floodlight will be aimed approximately four feet high. After installation is complete, aiming can be adjusted to produce the best appearance. Mounting a full or upper visor to the floodlight can reduce unwanted glare.
Aiming point = 2/3 x sign height
2/3 (6 ft.) = 4 ft. high
