Incapsulated 9 Watt Fluorescent Quad Tube Housing and Ballast. Specifications include: Osram Bulb included, 120 Volt, UL Listed, Equivalent BR-40 Reflector Bulb approximately 50 Watt. Overall Height 6", Width 4-3/8", Non-Self Ballasted Bulb and is replaceable (SL03780). Not to be used with a dimmer.