The reason I ask is that I am deciding on either a 250w or 400w halide and
the prices are comparable. I have a 36"x16"x17" 46 gallon. I'm building the
canopy myself so that isn't an issue.

400w on a 46 is probibly gona be NICE for a while i ran 400 on my 37T, ive even considered
going back to 400

problems of too much light are mainly heat related. once you get over heat, there is not
much else left


--
Richard Reynolds