I start mine under two fourty watt flourescent bulbs for 24 hours straight. When they are about four inches tall I move them to a 400 watt HPS, on a 12/12/ schedule. If they seem like they are not filling out and the stems are thin, I move them back to the 24 hour flouros until they get a liitle heftier. Right now I am struggling with the weather. Spring just won't come. We get two days of 70, then 26 degrees overnight and back into the high 40's and low 50's. I am starting to harden them now by taking them outside on warmer days and then keeping them in my spa room (10 windows) at night and on cooler days. I attached some pics of the babies. I planted waaaay too many as they did much better than expected. I have six kinds of peppers going in my grow room, some perennials for my landscaping and eight kinds of mint and lots of herbs. Glad I started them myself as they liook much better than the $10.00 plants the greenhouses are selling...and they are organic and all heirloom varieties. Yay tomatoes!