Simply Conserve ENERGY STAR GU5.3 50-watt EQ 50-Watt EQ MR16 Warm White G5.3 Base Dimmable LED Light Bulb (10-Pack) in the Spot & Flood Light Bulbs department at Lowes.com
GE 79584 30W ConstantColor HIR MR16 GU5.3 Spot SP10 2950K 12V Halogen – BulbAmerica
Philips LED 50-Watt MR16 Floodlight Light Bulb, Bright white, Dimmable, 40-Degree Beam Spread Angle, GU5.3 Base (3-Pack) - Walmart.com
ZEISS 12V 35W Halogen Bulb Reflector GU5.3
24V DC | MR16 LED Track Light Bulb | GU5.3 Base | Watt-a-Light
MR16 5W 12V LED Glass GU5.3 Light Bulb | Landscape Lighting Accessory – Sun Bright Lighting