Now I understand
Some of my basement.
http://garden.org/thread/go/44...
Worked on it all weekend getting ready for seed starting. I added metallized reflective film on 2 walls and the ceiling and repainted the shelving semi-gloss white. ** 7 or 8 fluorescents in addition to the metal halide lights. With 2 trays per shelf under the fluor. lights, I can start > 1,000 plants. On some shelves I place 4 trays side by side. That way I can start more seeds! Two years ago I started ~ 1,500.
** I opened the basement door to help with vapors and could listen to birds chirping - On topic, eh?