E-Simpo® 6pcs E14 to MR16/Gu5.3/G4/Gu4 Adapter EU Candelabra Base E14 to MR16 Spotlight Bulb Base Holder Socket Converter,Ceramic, Make Sure The MR16 Lamp Working Voltage is The Same as E14 Socket - -
TORCHSTAR MR11 LED 3W Light Bulb Non-Dimmable 2700K Warm White GU4/Bi-pin Base | Wayfair
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
ABBA Lighting USA MR16-7W-2700K LED Light Bulb | BuyRight Electric
3W MR11 LED by Green Creative - Marvel Lighting
Sealed halogen light bulb, 12 V 50 Watts, MR16, GU4 base | eBay