I didn't know there were bulbs labeled for use in enclosed fixtures. I'll have to check for that next time I buy light bulbs. My bedroom ceiling fixture is the one that goes through bulbs the fastest. It's not completely enclosed but not as open as my living room floor lamp, either. (it's something like this
https://www.lowes.com/pd/11-75-in-Wh...ght/1001321392)
At least it has two bulbs and so far they haven't gone out at the same time, so I have some dim light in the room until I can replace a dead bulb.