FWIW Im running the taotronics LED
's over an 180 the lights are 34 inches off the bottom tank is 24 high I get great growth from my SPS
which sit on the sand bed IMO
you cant go wrong for the price. You'll need two for your 90.
The violet LED
's are billed as a UV
the tao's dont have them but it dont seem to bother the coral.
Most people create their own problems by not following the basics and refusing to stock appropriate to their system. Gregcoyote 2013
SPS = Stability Promotes Success