In person I would have to say that it looks similar to MH lighting and the kelvin would look to be around 8-9000K, I have abunch of 5watt LED's too but dont have them on the tank right now, at 8 watts it looks the equivlent of about 40watts of lighting....something around there Im really not to sure, I really like the shimmer effect they give off, makes it nice and crisp!
when I make my LED lighting setup for the 1200+showtank, I will get a par meter to do some tests

I can get some pics of the casing soon but it is very primitive acrylic case to keep moisture away as it is just temporary

when I was playing around with the 6x 5watt LED's, it looked like it was as bright as a MH and it shimmered more intense with a very nice crisp white with a decent blue tint to it and corals glowed like I had 1,000,000watts of attinic lighting on them, I like LED's