The lights were tested on a laboratory power supply. With 12V 290mA to approve. The amcht an electrical output of approximately 3.5 instead of 4W. I have 20W halogen spotlights in the kitchen replaced by these LEDs. They definitely bring. Whether meet expectations when exchange 30W halogen is questionable. Since I know the slightly exaggerated in almost every LED light compared to the manufacturer, I decided the same for the 30W-Ersatzwariante and was thus correct. Seen my expectations have occurred. The Lichttemparatur is enjoyable (kitchen). The lights are measured 50 ° C warm. It will therefore not burn your fingers. Yet, no statement can be made about the life, because the lights are only a few days in Betreib.