Oh yes...

BTW, thanks for the link, NoWhereMan.

Can we pool our info on lighting fixtures in our closets here?

I have built a little [relatively - it'll fit on a desk and is meant to grow seedlings...] light box which has equivalent of four hundred watts of lighting power, using four 18w compact cool-white fluorescent bulbs, and has a computer fan for ventilation [not that it needs it yet, as it is open at the front].
I have not painted it flat white yet, as I'm trying to get a hold of a 430w metal halide bulb fitting to install into it as well - don't worry about the electronic timer, as it's rated to handle 2.4 kilowatts of load. [Have you seen the prices on those metal halide things? Eye-boggling expensive!]

I had understood that for indoor growing, and to get as much leaf as possible, one needs to supply as much light as possible. And for optimium results, the light spectra should approximate the solar spectrum [particularly the summer sunlight], apparently.
Fluorescents apparently work, but are diffuse enough that they need to be rather close to the leaves for efficiency, and my understanding was that the metal halide [sungro brand?] combined with fluorescent fittings would be optimal.
Anyone have better suggestion?