Iota I-42-EM-A-DL - Emergency Backup Battery - 90 min. - Operates 10W-42W (Twin, Triple, Quad Tube, 2D & Straight) 4-pin Rapid Start CFL Lamps and 18W-36W Long Compacts - 120/277 Volt Max Light Output: 650 Lumes Emergency Operation: 90 Minutes Fluorescent Emergency Ballast Battery Pack 120/277V