Got the light yesterday. Real nice fit on my 75g and is intensely bright w/ a great color tone. The power converter on mine is labeled as having a 15VDC output. It's a remote transformer setup w/ a blue indicator LED, much like a laptop or ink jet printer power cord, etc. It does feel hot, as does the aluminum chassis on the light. The top side of the light housing feels as hot as my Odyssea T5HO, where the Odyssea's transformer is cool as a cucumber. Not the best pic, but here's the tank lit up with the new 48" BeamsWorks 6500K LED, in an otherwise completely dark room.