I bought the bulbs to replace my recessed halogen spotlights. So I was able to replace 4 Watt LED Spotlight 10 x 20 Watt halogen lamps by 10 x. That pays off yet! That should be only one-fifth the power consumption! When we were exchanging the lamps, the surprise was great. The 4W spotlight brighter than the 20W halogen! Quite amazing! The light is warm, no bright white light. The radiators are made of ceramic. I will buy them again if they do not burn out too quickly.