If those are regular old shoplights (40W) the seedling can actually touch the bulb, EXCEPT at the ends, where the tubes are generally hottest? For best veg growth (under same) keep your top growth super close.
well i just stack a 1inch thick piece of ply wood, and put them on books, so much of them are less than a inch away from bulbs. no photos. will upload more tomorrow on growth.
Ok, as i was making a deeper whole to plant the sprout in, the stalk bent and 'folded' over. I made a support for it, and is now only showing 1.5inchs out of the dirt. This was with my tallest and oldest one =[
my plant did this also just raise the plant closer using books as stated before and the piled soil will help a bit and get that fan blowing a lil to help strengthen the stem, also let the plant search for that moisture in the soil it will provide better suport so the plant wont topple over as easily