I have a few LED lights that got cloudy or foggy on the business end, it seems like some sort of condensation, but I am not sure. It is usually Fenixes and Jetbeams, but none of my surefires suffer this phenomenon. Dunno why.
The inside of the lense can mist/fog up as the reflector heats up and the coolest place is the inside of the glass contacting the cooler air outside. I find that its worst with high power lights with larger lenses and on a cold night especially with direct airflow onto the lense e.g. when running with it.
TIR lights don't have the same problem as there's hardly any air inside the head.
I have a few LED lights that got cloudy or foggy on the business end, it seems like some sort of condensation, but I am not sure. It is usually Fenixes and Jetbeams, but none of my surefires suffer this phenomenon. Dunno why.
I've had that problem with a few torches. My easy fix was to find an old silica gel packet ( like the ones Jetbeam are so fond of stuffing into everything ) and placing it in the head of the offending torch. Leave it in there for a few cycles, then remove and try not to be opening head end of light unless necessary. I know sometimes this is not possible with small edc's etc, but thats where you need to improvise.
Ohh, BTW, you can re-activate silica to a certain extent by placing it in a low temp oven for a while. Just make sure its not in a plastic bag. I just place the beads on an oven tray, then when finished drying, tip them back into a little home-made linen pouch with tie-top.:wave: