I don't think 6 LEDs are going to give you enough for proper coverage over the surface of a standard 10g tank. I think you'd have significant spotlighting, Two units would be better, and three units would ROCK a 10g!......... IMO
Looks like it would be great for my LPS and Softies dominant 6g.
If its a 10g tank then I don't see why (12) 3w LEDs can't keep sps happy. You can mak two rolls of 6 LEDs each spaced out evenly. Use the 60 degrees optic on them and that should be plenty of light.