Ok, you may laugh and I admit this was done partially by accident...
I was just discharging my 18650´s for summer storaging down to 3.80V or so.
Burned my hands once or twice with 980L and thought, I´ll cool them down with water once in a while.
I took a plastic cup with 3" of water. Dunked C8, 980L and RC-601 in there tailcap first.
Had some thoughts of them taking water but then again, thought about seeing what happens.
Lights cooled down nicely.
After 15min of continuous run, opened them up.
All soaked (no surprise actually, they were all HOT!).
980L was soaked so bad, it had water all the way up to the driver! At this point, I was on a bit of a rush to take all up and apart to dry them, so sorry, no pics...
All lights were in the puddle tail end first about 3" and all were soaked pretty well.
Least flooded one was the plain basic C8, Romisen did also pretty well. Reason may be, that they were running a bit cooler.
Conclusions:
-When dunking, don´t dunk a warm light into cold water (duhh).
-If dunked accidentally, pick it up instantly.
-Think about it: Your lowest output light may actually keep the water out better than your hotrods!