One thing that is kinda funny on bulbs now offered. Most are or were the shape of a reg bulb! Flourescents put in side a reg shape dome to look like your old bulbs. NOw they are doing with some LED's. Heavy base on them and tapers up in heavy plastic, but has that round top bulb shape to finish it off, real element is just inside. Just a marketing way to sell the new ideas and still be like reg cheap bulbs in appearance anyway! I DO NOT believe the living for years claims on any of these bulbs tho. I've had so called "5 year" bulbs last a few months at my house, mostly in ceiling lights. Always seems one of the two in fixture is going out way too soon. I think those Flourescents don't really do well, unless vertical, not so good when laying over. Also hate the dim at first results, and late they are on full light. Many times in halls or small rooms you just go in for a few minutes, and out, they never really get bright as you would wish.