ok i didnt go "L" bracket i used conduit with a 90 degree elbow and double straps to hold it on the upper and lower 2x4, i have it about 15 inches above the water should i go higher im also goin to use tinted 1/4" acrylic to help dim it a lil, any suggestion on light aclimation for a 250w hqi, yes the t5 is still there i have 96w pc im goin to use for actnic light probally a 460/420 bulb