Crompton 5W GU10 Spotlight LED Introducing the cost & energy efficient, dimmable COB (chip on board) GU10 LED. Emitting over 450 lumens at an intensity comparable to a 65W filament equivalent, it consumes only 5W of power & is intended as a direct replacement for the inefficient, halogen GU10. Boasting an A++ energy rating & built to last an incredible 30, 000 hours, we guarantee that this is about to become a best seller. This bulb is compatible with trailing edge dimmer switches only.