its a florescent with 8 50 watt bulbs im about to post some pics of it in a few once i get them on my computerWhat's a T5 setup? Florescent, LED or HID?
As for the spectrum, the more blue, the tighter the internodes.
If a 'T5 Setup' is Florescent or LED, than you can bring it within an inch of the plant.
If HID it could be anywhere from 6'' to 24'' depending on the heat output.