I have a Kessil 15K Ocean blue light over my tank..I need to get a 2nd one for better coverage but this one does a pretty good job lighting a 30x18 footprint.
It shimmers JUST like a MH not the fast jittery nervous of most other multipoint LED..I had a DIY 32LED fixture before and the shimmer is sooo much nicer on he Kessil.
here is how it makes my new Aussie Duncan i got in glow..this is pretty true to in person image
video of the shimmer
http://vimeo.com/35221912