Platinum 50W 120V T4 E11 Mini Can Base Clear Halogen Bulb – BulbAmerica
Ascher GU10 LED Light Bulbs, 50W Halogen Bulbs Equivalent, 4W, 400 Lumens, Non-Dimmable, 2700K Warm White, 120° Beam Angle, LED Bulbs for Recessed Track Lighting , GU10 Base, Pack of 5 - - Amazon.com
Winsun LED Lighting Announces 5.5W/8W Dimmable GU10s to Replace 35W/50W Halogen with 315/430 Lumen Output Powered by Nichia LEDs — LED professional - LED Lighting Technology, Application Magazine
Dimmable GU10 50W Halogen Bulb Equivalent LED Bulbs, Daylight White 6000K, 450 Lumen 38 Degree Beam Angle MR16 Glass Track Light Spotlight Bulbs, AC 110V, Pack of 4 - - Amazon.com
Duracell Ultra 50W 600 Lumen MR16 Soft White Halogen Bulb - 2 Pack - HAL10430 at Batteries Plus
Euri (2PK) Lighting EP16-7W5050eG-2 LED PAR16, 7W Replaces 50W Halogen, 5000K 500 Lumen Daylight Output, 120 Volt, Dimmable, Energy Star, Pack of 2 - - Amazon.com
GE Classic 50-Watt EQ MR16 Dimmable Warm White Reflector Flood Halogen Light Bulb (3-Pack) in the Halogen Light Bulbs department at Lowes.com