These Energizer GU10 LED's are 4.7W with a 350 lumen output with being full glass they are the best replacement for a standard 50W Halogen GU10. The 4000K colour temperature gives a cool white glow, combined with the 36° beam angle this bulb offer a wide spread of light across the area of direction. These bulbs offer savings of 85% in energy compared to the halogen version.