Deb - what I wouldnt' give for nice windows
Ross that makes a lot of sense - I didn't even think about it that way. From a biochemical perspective the enzymes will constantly be active with the non-changing stream of light. Thanks for the reassurance!
With that in mind, I think I will go ahead and get the new-wave T5s - I think a 4ft by 4tube one would be good. Thanks for all your advice!
EDIT - bill I must have posted at the same time as you. Thanks for the great info. 250 bucks isn't completely unreasonable - now to find a source that ships to canada without further breaking the budget! I'm tempted to just buy them from the local hydroponics store, but 400 is a little ridiculous. This is really great info though about the sustained light. I was wondering why my phals were doing so well with 12 hours of only 200fc when they're recommended to have at least 500fc.