Drop-in fixtures allow you to customize color temperature, beam angle, wattage, and lumen output based on the LED bulb selection The MR16 Bi-Pin socket lamp base ensures easy installation and light output selections A polycarbonate housing with brass trim contains a screw-in cord grip connector for a water-tight seal and wire strain relief This fixture works with all Kichler MR16 LED Lamps which come in a variety of options All 12V low voltage drop-in fixtures require a fixture, LED Lamp, low voltage wire, and a transformer to operate as a system