I bought it for only a few days and had a zusammn Schreibtsichleuchte which is designed for a 40 watt incandescent lamp, well, that would have been pretty funzelig. I can not say anything yet about the life The light of this lamp is nice and bright and the Lichtarbe is also pleasant. What I find incomprehensible, the intense heat is developed this lamp that I had been with any LED lamp. Well, now comes the winter, because you can still equal aside a bit heizen.Scherz, I hope that the continuous operation is not the apartment is flared. Anyway, for me a reason not to buy these bulbs again