I was just about to suggest a PC/T5 W/MH combo as well for this shape of tank. When I had my 54 corner I crammed a 250 watt single ended MH in a 12x12 reflector over mine, but it left little room for my PC lights. In the end, if I would have kept the tank I think I would have just sprung for a 36" coralife or similar setup. Have fun mounting it though.
