Addendum: average environmental conditions are around 73deg, 44% humidity. one or two days saw a max of 85 degrees. and a couple of days saw a min in the low 60's. the lowest humidity has been 33%, max around 50%.

I would say energy cost would be the only limiting factor for vegetables under fluorescents. Vegetables like much light.

Thanks. Any cues for making the move over to the MH light?

Once they reach about 12".