jblack
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Not really: it's the filament that goes pop from thermal expansion, I don't believe HID lights have that.
Night diving rocks! As mentioned earlier, if you are a little apprehensive, go with a larger group that agrees to stay close together. It will help calm your nerves, give you more light and allow you to enjoy your first couple night dives that much more.
I was, of course, being tongue-in-cheek. Filaments aren't the only failure point, and some HID bulbs are pretty fragile.
There are still a lot of people with HIDs they bought when LEDs didn't compare. Also newer divers who bought HIDs used/new once they were reduced in price because LEDs were too competitively priced.
Seems like every time I've seen a HID for sale these last couple years they have been darn cheap. That's gotta create a few fans.
Our instructor also mentioned the "once your light is on, leave it on for the remainder of the dive" school of thought; the purpose being to avoid light failures and accidental flooding of twisties. I didn't address the inconsistency between that and our planned blackout where we planned to switch our lights off...