dawgdude;430191 wrote: Is this a SE or DE bulb and what reflector? Im assuming DE. You could also look into a lumen max/lumenarc reflector to see if they will help to spread the light more efficiently.
By top half I mean in the top half of the tank. IE the light is strong enough in the top half to support SPS but as you get deeper the PAR will drop off and not be enough to keep SPS from browning/growing.