A value pack of 10 5W SMD LED GU10 spotlight light bulbs from Crompton Lamps are a fantastic product that are both energy and cost efficient.Being 4000K It produces a crisp cool white light that is just as bright as a 50W halogen spotlight. The DuoDim Technology is compatible with both leading and trailing edge dimmers. It has a 15,000 hour life, is suitable for fire rated downlights.Please note that that it is only suitable for indoor use.Dimmable. Suitable for fire rated downlights. For Indoor lighting use only. Compatible with both leading and trailing edge dimmers.This LED GU10 spotlight lamp is traditionally known as a PAR16 with a GU10 2-pin twist and lock (10mm apart) base.Pack of 10 240V 5W (50W equivalent) LED GU10 SpotlightGU10 capYes - Dimmable4000K Cool White colour390 lumens