I bought 4 boxes of these bulbs and had to replace 3 of them as some bulbs were flickering, others would not turn on and a couple had the glass would come loose at the base attached to the lamp. The good news is that when I got the replacement parts they worked and looked great. The quality of production needs to be improved. The light has a nice glow and hope they last a long time. I installed them on an outdoor light pole that uses 12V AC.