IMO you may as well decommission the LED's if you're really that into running T5's. You'll have almost no significant benefit to running LED doing it the way you're proposing since you'll be spending so much of the money your LED's save on T5 bulbs....
If you can't add another LED spotlight to your current setup to cut back on shadows (or whatever) then you may have simply picked the wrong LED's. It does happen!
High priced LED spotlights seem to catch all the buzz so tons and tons of people seem to buy them in spite of not liking the results, which are naturally loaded with shadows. They look like halides, which more or less emulate shallow reef lighting....perfectly natural.
For some reason when doing the initial purchase, they don't even consider LED strips – which provide a very T5-like light...very unlike spotlights...very much like a deep reef...also perfectly natural.
Hopefully it's apparent I don't hold an opinion on one light vs another.....but I do think making a "hybrid" out of an LED system you don't like enough to use on it's own just makes no sense. Get your money back out and get what you want – even if it's a T5 system.
If you want to stick with lights that include a controller/sunrise/sunset/effects when you switch, then check out GHL's Lightbar2's and Current USA's Orbit IC or Pro. If you have a controller to do dimming on plain LED strips, then you have a ton more options. (The rest of Current's line, Hamilton Tech's strips, et al.)
