Dive / Cave Light

I am looking for a cheap, light weight and fully waterproof (i.e. dive rated) single or double cr123 based light to attach to my helmet and forget about it till I need it.
Given how good current head torches are the time I am most likely to use it is after a few years after getting very wet hence the lithium requirement.
2 hours plus of usable light is ideal. 2 single celled lights would be better than one double as they can be mounted on opposite sides of my helmet for better balance.
I already carry a zebra H30 as a spare but want something more water tight.
Thanks All

Maybe the Underwater Kinetics SuperQ eLED? It comes with a rechargeable batter, but will work with 2 x CR123


http://www.uwkinetics.com/product/122

Yep that looks ideal if it came without the charger kit so was half the price. It would be perfect if it was 1xcr123 but thats the general thing I am after

The Inova 24/7 is waterproof, but not dive rated. I just thought I'd toss it out there since it sounds like the other missed your price point.


http://www.brightguy.com/products/Inova_24_7_SmartBright.php

What about this Tektite? Not 123 but cheap C batteries. I had an early version of this light and it was rock solid; and the CS was as well.

I love the Tektite and was going to mention it but he wants to helmet mount two lights. 6C's plus flashlight guts on a helmet would make for a neck stretcher I think.

It would indeed be WAY to heavy.
Plus I also want lithium based cells. They are not going to be used often so I don't want the cell to just die after a couple of minutes.
I am really hoping that there is something like a Q40 or an impact XL but with cr123 cells.
this is ideal apart from its price / availability in the uk