Canister lights?

[matt t.]

I've never had a problem due to turning lights on or off in water or out of water, or due to any length of time on or off (in or out of water).  I did have a problem with a can cooler melting to the lens on my first HID due to it inadvertantly being turned on out of the water with the cooler "protecting" the bulb, so I no longer "protect" the bulb with a can cooler. I do have to make the comment that I find it really odd (and it is VERY common) that people will spend over $500, or in most cases well over $1,000 or even $1,500, and refuse to spend $100 on a sturdy padded case for their lights. Years ago when they first came out, I saw tons of posts about the Salvo lights and their ability to pound nails and be thrown against a wall. My Halcyon Helios 18/9 light is over 3 yrs old and still going strong on the original bulb and battery. If you want to pound nails, hammers are a lot cheaper than HID lights. IMO the LED lights are eventually going to be the standard for primary lights, but they are still pretty new and not proven enough for me to spend the big $$$ on one anytime in the near future. YMMV.....