Recently installed LED low beam headlights and I could no longer use the factory screw in the dust cap. I was able to use high quality 3m double sided tape to attach the LED driver to the inside of the headlight housing, put a dust cover over the entire hole and seal it. Regarding humidity/rain, I didn't see any water seeping into the case after riding in the rain. The material feels thin so time will tell how long they last under the hood in the heat but for the price they would be easy to replace. Highly recommended for HID/LED conversion where the factory dust cover cannot be screwed back on. The vehicle they are installed on is a 2018 Toyota Highlander XLE.
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