Westinghouse 5-Watt 12 Volt Halogen MR11 Clear Lens Narrow Flood GU4 Base Light Bulb 0476600 - The Home Depot
Feit Electric 20-Watt Equivalent MR11 GU4 Bi-Pin Dimmable 12-Volt Track Lighting 90+ CRI LED Flood Light Bulb, Bright White BPFTD/930CA - The Home Depot
Lamp Halogen Led Spotlight | Mini Halogen Lamp 20w 12v | Halogen Bulb Mr11 Gu4 12v - Led Spotlights - Aliexpress
Satco S3194 5 Watt MR11 Halogen GZ4 Base 12 Volt Clear NSP 9 Beam Pattern Light Bulb, No Lens - Halogen Bulbs - Amazon.com