Crompton GU10 5W Dimmable LED Spotlight Introducing the 5W LED GU10, equivalent to a 50W halogen/incandescent equivalent it offers exceptional value for your money without any compromise on brightness. Designed as a direct replacement for your power hungry filament light bulbs whilst yielding savings of over 90% on electrical costs, it emits a crisp, cool white light that lasts an amazing 30, 000 hours.