Compact, low profile LED exit signs are as brilliant and visible as standard incandescent signs, yet use a fraction of the power. LED light sources require no mainten ance for 25 years–saving greatly on maintenance and upkeep costs. LED exits are ideal for commercial and industrial standard non-emergency applications where low maintenance and operating costs are a must. LED exit sign with 6" green letters and brushed, die-cast aluminum single face with black housing. Exit sign is powered by LED source for maximum life without maintenance; emergency fixtures utilize high performance. In the event of power loss, both sign and heads will operate for a minimum of 90 minutes. Battery backup.