For shallower tanks, this light does wonderfully. I'm using it on a 36"x8"x9" long bookshelf tank.
On this tank, I can get up to 100 PAR at substrate (7" from light) which is more than enough. I actually had to dial it back. If interested, I measured PAR for all of the various modes.
Last edited by somewhatshocked; 05-31-2013 at 01:07 PM.
Reason: Post your PAR data here, don't link to your external site without approval