Emergency fire exit signs, also called fire escape route signs must be visible, even when the power supply to the normal lighting fails. Illuminated fire escape route signs and fire exit signs fulfil this requirement. The minimum back-up duration of emergency lighting is specified by local regulations and is generally between 1 and 3 hours. All our units have a 3 hour internal back-up battery. Our range of illuminated fire exit signs are available in a range of designs, with maintained or non-maintained operation, and with LED or fluorescent light source.