I have five LED bulbs outdoors near the Twin Cities in Minnesota, all of the same brand (Feit 800 lumens, if that matters), which have been installed somewhere around mid-summer 2013. We don't have dimmers, just a bog-standard on/off switch.
Four of them work perfectly fine, but the fifth doesn't. It glows dim, while all the others burn brightly. There haven't been any circuit, wiring, switching or other changes; the only thing I can think of is that we're springing out of a reasonably cold winter.
This bulb used to work well, too, similar to the others. And it's now consistently dim.
This is in a slightly-difficult-to-get-to spot, hence the question instead of pulling out ladders and playing with different bulbs / configurations.
Is there anything that could contribute to this issue?