Curious if you use a PAR meter to tweak your lighting or if you just eye ball it? I just ordered the SQ-420 PAR sensor to play around with. Also ordered 2x ATI coral+ t5's to supplement the LEDs. Looking at your light spread it looks really even, like the skys do a really good job of diffusing. Running just the Photon seems to give my tank a lot of really crisp shadowing and I am hoping the T5s can smooth it out a little.
Matt
Matt