A G-Shock isn't using enough power to heat itself more than a fraction of a degree above ambient temperature.
I was thinking of a hot bath in a cool room.
Fair enough, its definitely sealed better than flashlights, good point.
I have had water condensation on the outer part of its mineral glass, but never inside.
I prefer Fenix lights, are they less susceptible to this kind of thing?
I’m not afraid of the dark, the dark is afraid of me 
More realistic reason there. But even if you are alone, what self respecting flashoholic would bring only one light to an oceanside camp to play with, when you are not far from the car? 
They were rather impressed with my lights, and I gave some lights as xmas presents and a small one with NiMH away to my niece…maybe they’ll get the flashoholic bug now too 
[quote=kreisler]
If there is condensation inside the head, wouldn’t it get vented if the flashlight was run until it was hot enough to turn the water to vapor?
One of the problems with this light is that it doesn’t seem to have a way to vent anything, which I understand is the main reason that the switch can balloon up. There was even a thread on CPF where Nitecore suggested poking holes in the switch cover with a needle. Maybe that would help it shed moisture as well?
It would, as long as the gas it pulled in when cooling had less moisture than the gas it pushed out, and if you already have problems, there isnt a reason not to try it. When it gets hot, the water will all become gas, and evacuate the chamber. I really think we can guess most lights do not have a complete seal, and when the pressure gets high enough it will suck up or spit out some gas, depending on the pressure gradient.
Open to commenting again.
Looks like 9 rude, controversial, and/or kreisl posts were deleted.
:)
kreisler was innocent this time.
Well, maybe something other than flashlights got vented and solved a different problem.
I believe it was a Spark SG which was suposed to have reverse polarity protection - but didin't!
I have two EA4s and I absolutely love them. But that being said, this post shows that our traditional budget lights are still a pretty good value, and that quality is really a tossup no matter who the manufacturer is.
Two is one, and one is none!
My body has never had a problem going into the Sauna either… Well I get a little wrinkled, but my skin always dries right out later on, 
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Flashlights are not water proof (except diving lights - maybe), they are water resistant, but nothing is impervious to moisture being formed from the already present moisture level in the air that is in the light. Maybe we need to save all those moisture packets out of the pill bottles and stuff them into our lights.
Nurse!! More Pills Please!!!
The talk about moisture behind the lens reminded me of this old thread:
I guess humidity can be tough on flashlights.
Whoa wonder what I missed in this thread?
Anyway yesterday morning the light appeared better, less moisture behind the lens, and it worked mostly fine. Except the fact that strobe would activate sometimes when I would turn it off from one of the half press modes. I had sent a RMA request, and got a response from Fasttech- I’ll have no problem getting a new one. I was having second thoughts about sending it in until I got home last night and now it wouldn’t turn on. Alright so it’s gong back.
Yep!
Yes it was the Spark SG3. Contacted them a few times about it and never heard back.
Alright, no Spark headlamps for me then, if thats their attitude ;)!
SG5 looked ineresting…