<font color='#000080'>OK OK I have a problem with shiny things and can't help myself....
50W 12V nickel plated steel head running at 14.4V (more like 75W) with pulsed electronics, 4 dimming levels, auto battery protection, low battery warning, 19.2V D cell rechargeable battery pack, full ocean depth wet mateable connectors, 10mm Borosilicate toughened blast furnace torch glass. Burn time of 60 mins at full power, 250 mins at min power. Scares the crap out of the fish and you can use it to cut steel. Makes your HID look like a pilot light.
Sorry. Got carried away.
And when you switch it on, it gently dims the bulb up to stop it blowing. Oooh- and the switch is magnetically operated so no leak paths there then.