How Do Photoluminescent Exit Signs Work?

Photoluminescent exit signs do not require AC or electrical power. There is no battery or on/off switch. They require 54 lux or 5 foot candles of mercury vapor, metal halide, fluorescent lighting, and LED Lighting to charge them in which makes them illuminate. The term 54 lux or 5 foot candles is the required minimum amount of light to charge to insure a proper charge. The average office building has no problem meeting this requirement. In this charging process photons are excited and then brought back to a lower state. The photons then will be absorbed by a substance via electromagnetic radiation, which will take these to a high energy state and then moved to a state of lower energy. The photoluminescent exit sign will be fully charged in 60 minutes. They stay at there peak illuminate for a minium of 90 minutes however it can takes about 16-96 hours in darkness to fully discharge. Available in 50', 75' and industry leading 100' viewing distance