What high power LED to use for this random waterproof driver I have in a dive light?

While digging in my box of lighting and electronics parts I stumbled across an LED driver I had picked up off ebay about a year ago.

I think it is for a 30w high power LED, and I would like to use it to build a high power LED canister dive light.

Here's the stats that are labeled on the driver:
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WATERPROOF ELECTRONIC LED DRIVER

INPUT: 100 - 240 VAC 50/60HZ

OUTPUT: 12V 2.5A
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Recommendations for a what high power LED? Can this driver be ran off of a battery pack effectively?

I'm going to make a canister light using one of these high powered lights, the existing LED driver, and a rechargable battery pack. I'm thinking about incorporating a few ideas into this light. Definitely doing the standard waterproofing with gaskets and such, using an alluminum heat sink in the head of the light (probably a mag lite head with a slug) But I've also been toying with the idea of using the mineral oil inside the dead space of the light head to further dissipate the heat. I figure that in conjunction with diving in the cold waters of the PNW, it should stay cool.

Thoughts?

I've had a 50w high power LED with a CPU heatsink and fan wired up and running over one my coldwater marine aquariums for about a year, which is what got me thinking about doing this.

It wants AC input. Are you doing tethered dives with an extension cord?

Like AnAppleSnail said, AC. Notice in the first pic it says Input: 100-240VAC 50 to 60Hz

check on what the IP67 rating means. From what I can get from the wiki page, it means that it is rated for immersion to 1 meter for 30 minutes. Pretty good for AC powered equipment (so it won't fail when you take it into the bath tub??), but probably not so great for a dive light.

Steve K.

Okay, I was wondering if that was the case. I think all the writing in chinese had me distracted, lol.

Maybe I'll just wire it up for use over one of the fish tanks then and go with a design for a dive light thats already out there.