Bulbrite 637420 - FTD/Y - Yellow 20 Watt MR11 Style Halogen Light Bulb, 12 Volt, 36 Degree Beam Spread 20 Watt, 12 Volt, 36 Degree Beam Spread Shape: MR11 (1 3/8" Diameter) Base: GU4 (4 millimeters between pins) Life: 3000 Hours Yellow