Darren, I found your lighting set up :)

[Delphinus]

My take on that is, IF it's just for "accentuating" AND the heat is of no concern; then go for it. But just be prepared to deal with the heat somehow, and pay the old hydro bill.

I don't think the sprectrum is anywhere useful for photosynthesis. You don't even see halogens used in hydroponics/agriculture situations...

Personally, my "dream" is to be able to use more sunlight than anything else. Either in a south-facing window, a solarium, or greenhouse. Still need to be able to deal with the heat, of course. The one tank I have, that gets sunlight (more by accident than by design, it gets direct sun near the winter solstice, because the rays come in through the south window nearly horizontal at that time of year, and they reach over to the tank on the north side of the room), everything just goes NUTS when the sun is on them. Very pronounced expansion of polyps, stoneys, and anemones. They're definitely at their best for me in the wintertime; and just in a "holding pattern" the rest of the year.