We had problems with installation orientation when we first purchased
Lights of America bulbs. Some burned out in just a few hours use
upside down. We've had no problems with any other brand.

Gideon

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Trekking Tom wrote
Do not install them in a wet environment ( bathroom) or installed
upside down, or inside a globe. The electronic get too hot and will
brun themselves out. I have them in my outdoor lights and they work
great. Also through out the house.