My light setup from this past December-January.
This is Room #1
This is Room #2
I sowed 212 tomato seeds and ended up with 208 tomato seedlings, and 65 bell pepper seeds, and ended up with 65 bell pepper seedlings. NO damping off. After almost a week of potting up to 16 oz. solo cups, those last four tomato seedlings just got tossed, 'cause I'd just about had enough of it, and they were the absolute runts of the litter, at about 1am on a work night...
I had a total of 4 growing shelves (concrete blocks & boards). Each shelf had two 2-bulb fluorescent light kits placed side x side, for a total of 4 lightbulbs per shelf. I'm lucky the DEA didn't come knocking on my door, 'cause I'm sure the satellite picked up on my 24/7 lights -- prime candidate for a drug bust!
I used kitty litter trays from the $1 store to hold twelve 16 oz. Red Solo cups each. Those trays are very sturdy, so I could hold one tray in each hand with confidence. I could get 3 trays on each shelf. Do the math, and, Yes, there were more plants than available shelf space. Solution? Run the lights 24/7, and rotate the trays out morning and evening (7am-7pm-7am)
I kept the house cool in the winter, too, like RickCorey, around 55 days and 60 degrees nighttime.
I grew the healthiest crop of tomato seedlings ever this past season. Discovered I enjoy the challenge of growing healthy stock far better than actually growing the tomato plants -- but, don't get me wrong, I'll take a ripe Black Krim, MOMOTORO, or Pruden's Purple, any day!
SEEDLINGS IN CAT LITTER TRAYS
Then, I made a newbie error, and overfertilized my seedlings. Ended up losing almost a 1/3 of the stock before they recovered. But, with some babying, I managed to bring home the most bounteous harvest of all my growing seasons combined since 2008, on my healthiest plants since 2008!
I had a glorious, exciting, and challenging 2010 Winter/Spring season!
THIS DAY'S HARVEST
My plan for the 2011 Wtr/Spr season is to sow seeds December 17th for plant out by February 11, 2012. It's WAY early for our area, but, I've learned that with protection, those plants can (and WILL) maked it! If all goes according to plan, I should be pulling in the last of my long-season, indeterminate, heirloom tomatoes by mid-June.
Hugs!
Linda