I have built two Osram LED Star Classic A60 bulbs in two different lamps. The first time everything was fine. The LED bulbs worked well. After about 250 hours of operation both lamps showed then but the same misconduct. First you went to a time delay and shone only faintly. After some time you fell off completely. I think for this price, you should really expect a quality product. 250 hours are simply too little and when I read the other reviews, this seems to have been an isolated case. I contacted the seller but not received any reply. I can not recommend these bulbs