Hi all! I just ordered the 4x55w bright kit from ahsupply for my 90 gallon tank. It's a standard 25in deep. I am planning on building a canopy for it similar to the one buck describes on his website. My question is how high above the water should the lights be and what type of placement inside the canopy should I use meaning do I kind of center the 4 lights or is it best to put them closer to the back and front. I don't really know but am looking for any advice you can offer. Thanks so much.