yehp, i have the aquablue special directly above the sps so they get most of the white light. my acans are growing fast as well. my rainbow acan went from 4 heads to 10+ heads in less than a month. i also have a purple death frag in there that went from 3 to 6 polyps in 3 weeks. the purple deaths are maintaining their colors too. 4 t5's are probably just the right amount for growing sps. more than that is just for coverage