LED Emergency Exit Sign Light with 90min Battery Backup, 4000K, 120-277 VACLED Emergency Exit Sign Light This LED Emergency Exit Sign Lights with Battery is a must have for any commercial or industrial building. It is UL listed for safety and features a battery backup in case of a power outage. The sign is also weatherproof and can be used indoors or outdoors. The sign is made of durable Aluminium Housing and features bright, easy to read LED lights. The letters are large and clear, so they can be seen from a distance. The