I was hoping that someone could let me know what type of light setup has worked for them to overwinter Cattleyas and Oncidiums. I have four 4' T-8 shoplights to use on two 4' x 2' shelves, and was hoping this would be enough.

I have had success with Dendrobiums under four 40 watt CF's in a 2' x 2' area 18" under the lights, but was hoping that someone could let me know what has worked for them.