i have under tx5 aquactinics t5's 3 ATI aqua blues(12k), 2 blue plus actinic, these t5's are bright with good individual reflectors, all my ricordea shrunk down from lights being to bright had to hide them under over hangs. Water has been great ph 8.0, salinity 1.025, haven't checked phosphate yet since i just got done fighting bubble algae outbreak with some hair algae. Skimmer went nuts from something spawning and salinity got down low for week due to overskimming and didn't catch it in time and that caused algae outbreak. Everything coming back great now. Tank has medium flow except for H. magnifica got powerhead aimed down on it since it is really happy with high flow.