Contractor Select, Electronic, Fluorescent Battery Pack, Input Voltage 120/277V AC, Number of Bulbs Supported 1, Max. Bulb Watts 40 W, T12, T8 Ballast Bulb Type, Initial Lumens 500 lm, Steel Housing Material, 9 3/8 in Length, 2 1/2 in Width, 1 in Height, Low Profile, 90 min Emergency Illumination Time, 72 hr Recharge Time This product contains a chemical that is regulated under California Proposition 65. Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. -