Ok so someone in my local club wants to trade me lights. I have a Current USA 150W Mh. He wants to trade me for a 4x24W T5s fixture. I really one have zoas and LPS. The tank is 20" wide, water is at 16" top of tank is 18" deep. It is rimless so there is a gap. Will the T5s be enough to maintain my reef? I need you advice. I do have a evaporation issue because of the fans to keep the tank temps right. Evaporation during the summer is almost a gallon a day on a 28 gallon tank. What do you guys think?