Triangle Bulbs T10146-10 (10 pack) - Q20MR11/FL/CG, 20 Watt, MR11 With UV Glass Cover, 12 Volt, G4 Bi-pin Base, Halogen Flood Light Bulb, 10  Pack Pack of 10 bulbs Bulb Type - 20W MR11 FTD Base - GU4 (Bi-Pin) (4 Millimeters between Pins) Finish - UV-Stop cover lenses Reflector Flood Light