Lithonia Lighting Lighted Exit Sign and Em *Sign Material: Thermoplastic *Indoor and Outdoor: Indoor *Bulb Type: LED *Product Type: Lighted Exit Sign and Emergency Lights *Assembled Length: 4-3/4 in. *Number in Package: 1 each *One Sided or Two Sided: One-Sided *Assembled Width: 19-1/4 in. *Assembled Height: 8 in. *UL Listed: Yes *Voltage: 120/277 volts *Battery Operated: Yes *Twin LED lamp heads operate in emergency (DC input) mode with 12 series-parallel white LEDs in eachhead *Provides redundant light sources to ensure emergency lighting performance *Typical life of the exit LED lamp is 10 years *Dual-voltage input capability (120/277V) *Edge connector on printed circuit board ensures long-term durability *Suitable for applications requiring both exit sign and unit equipment *8-inch tall design is great for above-the-door applications and other tight fits *Optional high-output version with remote lamps are ideal for emergency egress lighting*Impact- and scratch-resistant thermoplastic housing *Universal mounting: top, end and back *Ni-cad battery or HO battery options allow use with up to six LED lamp heads