TORCHSTAR UL-Listed LED Emergency Light with Battery Backup, Adjustable Two Round Heads, White, Available in Damp Locations, 120V/277V Input, High Light Output for Hallways/Corridors/Stairways - EL03 UL-listed for safety operation, flame-retardant, impact-resistant, thermoplastic housing; Input voltage AC 120V and AC 277V are both available Ultra-bright: High bright 12pcs LEDs per head, bright enough for emergency lighting in a power outage Fully adjustable dual heads: 360 rotation of axes & 90 arc sliding band, flexible heads for directing light as you need Battery backup: rechargeable NiCad battery, more than 2hrs continuous lighting for emergency when electric shutdown Easy to install: surface-mount via back plate; fits most US standard size junction boxes, wall or ceiling mounting, can be used in damp location