Wow thats powerful!!! How much did that cost in rough USD equivalent? Glad you posted!
with the $ being so low, the euro -> $ conversion makes it expensive.
Akku-Tanks
The Lamp head is 527 euro
The tank battery package is 683 euros
The Goodman handle is 50 euro ( you can probably make your own cheaper. )
Google says 1210 Euros ~= 1.803 U.S. dollars
Not the cheapest, BUT .. somewhere near the best IMO =) Also, tahts in europe, im not if they dont have a US dealer, then it might nbe alot cheaper. Thats an assumption though. Example .. if i buy the Sealife DC800 Pro camera here in Denmark, i woudl have to pay ~1700 USD .. but i can get it for 799$ if i go to a local diversdirect.com shop in the US.
You could option for the flood light spread ( 90 degrees) or you can get 12 degree or 24 degree spread on it.
You can also buy a camera mounted light for video recording.
Again, bear in ind, this baby runs ~3 hours on a fully loaded battery and the light is just ... WOW.
I used it for some night dives in the red sea September 2007 .. and i was inspecting the reef wall at around 20 feet deep .. and from land they thought i was in distress since they assumed i was pointing my light straight up. I was not, i was just pointing it a few degrees upwards on the reef to follow a lion fish with the light. So its really powerful
EDIT: also .. as for "power" in lumen, i belive it delivers a stunning 4K yes ( 4000 ) lumen .
Also, i think the brightness of the light is somewhat around 5500 Kelvin, so its not some piss yellow lightcone you get either