Ok, I have the same question here.
I'm using an envirolight setup which apparently is slightly different to other CFL's .
I have a 2 light reflector hood for mine, like the one they sell on their site (tho I didn't get it from there) ok ..
I'm slowly building my setup bit by bit, I just don't have all the money to go out and buy exactly everything I want at once, and some is hand built.
My setup can be seen in my album, tho i need to take some better pics.
Right, sorry, I'm babbling, lol, wonder why ...
I have spaces in each for 2 bulbs (building two spaces) at the moment I have two 200watt white bulbs, I'm on my first grow with this setup, but last year I did just hang it up in a shed and grew some plants under it and did ok. (with no reflection in walls, forgot to water some days and was in winter so had a little heater which came on now and again, not proper timer tho, i got a fir crop from 6 plants of pretty good weed)
O.k.
So, do I carry on with this lighting regimen in the new box (its proper this time) or should I add a red 200watt one in there too when I switch to 12/12? I know it will flower and crop fine with the one I have but will it make a significant difference?
Also, I've just picked up this 50watt UVb reptile light which I'm going to put in there for flowering (to aid the THC content according to some stuff I've read.)
If I do that, will I not need a red bulb in there too?
Thoughts?
Mor