MR16 12V LED Red, Green, or Blue Single Color GU5.3 Light Bulb | Lands – Sun Bright Lighting
Quick look: The new MR16 spots with GU5.3 socket - Hueblog.com
GZ4 GX5.3 (GU5.3) G6.35 GY6.35Bulb Base Lamp Socket With 90 Degree Mounting
Feit Electric 50-Watt Equivalent MR16 GU5.3 Bi-Pin 12-Volt Dimmable CEC Compliant LED 90+ CRI Flood Light Bulb Bright White (3-Pack) BPEXN/930CA/3 - The Home Depot