Sunlite 50-Watt Equivalent PAR16 Energy Star and Dimmable GU10 Base LED Light Bulb in Cool White 4000K (6-Pack) HD03546-6 - The Home Depot
LUXRITE 50-Watt Halogen Equivalent MR16 Dimmable GU10 Base LED Light Bulbs Enclosed Fixture Rated 4000K Cool White (16-Pack) LR21502-16PK - The Home Depot
JSVSAL (6-Pack Dimmable MR11 GU10 35mm Mini LED Light Bulbs,4000K Natural White, AC 120V, 3W GU10 Base Spotlight Bulbs Replace 25-35W Small Halogen Bulb for mr11 Track Lighting - Amazon.com
Ledrise - High Performance Led Lighting Philips LED Spot 2.4-50W GU10 840 B-class 380lm 4000K