250W or 400W?

[rickjames]

Originally Posted by Mike Olson

I getting lights for my new 150g tank..24 inches deep. I have a huge (14 inch dia.) toadstool that will be in there. I have 1- 400 W halide for the new tank already, and I was going to place in the middle. I was told that I should get 2-250's for the sides if I was looking at keeping softies in the tank as well...apparently 3- 400W halides would be too much unless I just keep sps's and lps's. The toadstool is 12 inches tall and I was plannig on placing near the bottom which would give approx. 12 inches of water and 6 inches of air between it and the halides...I would prefer to go all 400's, but I want to keep leathers etc. as well

What are the dimensions of the tank? I light my 5 foot long 150 with two 400W and that seems to be the best configuration.