I've been running Green Element lights for over two years now. They aren't blue or fancy, but they get the job done very well for my purposes. I prefer a more natural sunlit look personally, and I'm OK with a pretty white light. I had a 36" dual 3W (two rows, I think it was 24 x 3W LEDs) set over a 30 gallon mixed reef that did very well, and now on my 90 I have a 48" quad 3W (4 rows) with a timer and I am extremely happy with it. I'm using the two row one on my 50 gallon FW tank now and it's growing some nice plants for me now
Here's a shot of the 90 - been going on 6 months now:
and the 30 in it's best time:
I bought them from an ebay store called "Topdog Sellers" that ships from Texas so it only takes about a week to get them, and the 48" light was only $225.