Sunlite 20-Watt MR11 Dimmable 10-Degree Narrow Spot 12-Volt GU4 2-Pin Base Halogen Light Bulb with Blue Glass Cover (6-Pack) HD03608-6 - The Home Depot
KOR (Pack of 2) 10 Watt MR11 12 Volt Precision Halogen Reflector Fiber Optic Light Bulb 10W 12V - - Amazon.com