NW2000E4 Inch Low Voltage Non-IC Shallow New Construction Housing is equipped with thermal protection and is suitable for damp locations. Non-IC designation requires that insulation be kept a minimum of 3 inches away from housing. Below ceiling accessible. Takes up to 7/8 inch ceiling thickness. Low voltage electronic 12 volt transformer included. One 50 watt, 12 volt GU5.3 MR16 bulb is required, but not included. Dimmable with a low voltage electronic dimmer. See attached dimmer compatibility reference when using LED bulb option. Suitable for damp locations. UL listed. 4.25 inch ceiling cut out. 14.38 inch length x 10 inch width x 4.5 inch height. A complete fixture includes a housing and trim, sold separately.