These are as good as I have been able to buy. I use these on some outside lights, they have been a nuisance due to how long they last, I think its the fixture and the bulbs.  These last as long or longer than the same bulb that costs much more at a big box store.  I am looking at LED but I tried one a couple of years ago and that did not work 2 weeks, these bulbs are lasting over 6 months on a electric eye system.