i dont like the look of the led,s light when you turn them up,extremly bright,and thay dont do nothing for the colours of the plants,greens and reds,i only run my leds at a maxinine of 50% over my 120cm tank thay are very very powerful as i have found out,with a algea outbreak,with t5 you get a realy green look to the plants,with leds,i dont think you do,i just recently went down charterhouse aquatics,and had a look at the ada tank,thay are running a ada solar 1 mh light on the tank,and it is very impressive,anyone thinking of buying a expensive light unit,i would look at ada light even though it cost about 5 pound a month to run,havent decided if im going to try to sell my lighting and go for one of these...