LEDs are OK except when you need a lot of light to put a new piston in your ski-doo when your are a million miles from nowhere. Two Batteries give much more light then LEDs. The only use we have for LEDs in the Arctic is to show you where to put the key during our periods of 24 hour darkness. And thats after drinking 65 rums and coke.<br><br>Our experience has been that for real light go with double AA or D size batteries as a minimum. Single battery anythings will not give you bright light. They do power clocks really well. Don't forget this is an extreme enviroment. LEDs may work well for less severe applications without technical work.<br><br>Mariner.