Thin-Lite (716XL) 15 Watt Recessed Fluorescent Lighting Fixture Thin-Lite with Aluminum Finish 15 watt 12VDC light Suggested mounting opening: 20.125 inch x 5.313 inch x 1.25 inch Overall: 20.625 inch x 6.625 inch x 2 inch; 2.2 Amp Uses two F15T8/Colonial White fluorescent tubes; Light output: 1650 design lumens