Simply Conserve ENERGY STAR GU10 50-watt EQ 50-Watt EQ LED Mr16 Soft White Gu10 Pin Base Dimmable Spotlight Light Bulb (100-Pack) in the Spot & Flood LED Light Bulbs department at Lowes.com
MR16 Halogen Bulb 35W Dimmable 12V GU5.3 Bi Pin Base Spotlight with Long Lifespan, 2700K Warm White MR16 Bulbs with Clear Glass Cover for Landscape Lights, Track Lights, Fiber Optics, 6 Pack - -
6-Pack 6.5W MR16 LED Bulb, 12V, GU5.3 Base Spotlight Lamp Bulb, 3000K Warm White | eBay
LUXRITE MR16 LED Bulb 50W Equivalent, 12V, 2700K Warm White Dimmable, 500 Lumens, GU5.3 LED Spotlight Bulb 6.5W, Enclosed Fixture Rated, Perfect for Track and Home Lighting (12 Pack) - - Amazon.com
Light Bulb Size Chart & Series Guide - The Lightbulb Co. UK
Philips LED MR16 5.8W GU5.3 12V Dim 2700K 36° | Lightbulbs Direct
MR16 5W LED Dimmable Light Bulbs CE & RoHS Certified – Kings Outdoor Lighting
12-Volt Halogen Bulbs | MR16 GU5.3 Base | The Pond Guy