I've been posting on the old chinese lamp I have... The guy that imported it now develops his own lamps.. since no company delivers the right combination of cheap and good.
His product looks very nice, I actually might want to buy me one of these if he could create something to hook it to my camerahousing. The whole range of his prototype products can be found on youtube and on his site
The 25 Watt version for instance will deliver 1800 - 2000 lumen at 4000 kelvin, is dimmable from 100% to 25% and has a strobe function. Switch is magnetic and the thing a low flux, so no real impact on the compass. It is currently rated 100m waterproof. Great, KOR!
Check the site! (in Dutch)