I love the bright light these give off, but a word of warning, don't look directly at them when they're lit. I bought these to replace a couple of wall light candle type and also swapped out the centre ceiling lamp, because they seemed to give off a brighter light than the low energy fluorescent I had. These do get quite hot. I had one which the outer glass envelope broke. Fortunately it was pointing upwards and broke cleanly around the base. I assumed it must have been a manufacturing fault (may be loss of vacuum), but I sent a photo the suppliers and they replaced it with no quibble. I have not had any other issues to date.