hey nat, i hadn't chimed in here as the thread got more diy than my 'expertise' allows for, but just wanted to throw in a little comment. you know your hoods that you posted pics of a while back that come with two incadescent lights? well, i have that hood on my ten gallon and on one side there is daylight and on one side there is a light heavier on the blues. they are both compact fluorescents, 9 w each, and my tank looks pretty balanced and all the plants are doing pretty well in there. i keep thinking back to byron's post about how the best 'combo' in the cited studies seemed to be a daylight mixed with cool blue. well all the plants seem to be thriving despite the side-by-side and varied spectrum issue. sorry! i know it's slightly off topic but its my two cents. sounds like you might have a more visual thing though and not a plant growth issue.