Intelliv, electronic ballast, for 3 or 4, f17t8, f25t8, or f32t8 lamps, operates on 120v or 277v systems, high power factor, ballast factor .850 - .925, 50/60 hz input frequency, parallel lamp connection, 9.5"l x 1.7"w x 1.18"h, wiring diagram &/or instruction sheet enclosed.