GermGuardian LB1000 Genuine UV-C Replacement Bulb for GG1000, GG1000CA, GG1100, GG1100W, GG1100B Germ Guardian Air Sanitizers

I ordered four replacement bulbs for my GG1100B UV air filters and two arrived with the glass cracked near a soldered area where the glass meets metal. These happened to be the first two bulbs I opened and attempted to use as replacements. After tinkering with them in the filter and seeing they weren’t causing the same blue light ring in the front of the air filter, I went to remove them, noticed the bulbs were extremely hot and cracked near that soldered area. I tried the other bulbs to see if I had the same results and luckily I had success with them and they were not nearly as hot. Be wary of the bulbs you receive – with how hot the cracked bulbs had become after just a few seconds of testing, I am concerned they could be a serious fire hazard. (And they did produce light, but it was purplish on the otherwise blue ring, so there wouldn’t necessarily be a warning). Needless to say, I will be asking for replacement bulbs.