There is a minimum temperature marked on the box. I think it is -20F.
I am using these inside my house, so I don't see that as a problem.
I like the idea of a diffuser. LED bulbs run so cool, it would be easy to put something right in front of it without worries of fire.
I also noticed that this bulb is much less blueish than the C.Crane bulb that I had. It is less orange than my "warm white" compact fluorescent bulbs. It's actually a pretty nice color.
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