Mazman: Nice technique of burying the stem up to the cotyledons. I use it every crop. Only difference is that I leave a bit more room for watering. :thumbsup:
If you plan ahead, you can start the seeds in less soil, so after they start stretching, you can bury up to the cotyledons without transplanting.

jakal: With fluorescent tubes (and 23w CFL's) reflected light only extends a few inches, so no need to worry about reflectivity of the walls. By the time the light bounces off of the walls, it's insufficient for promoting photosynthesis. If using CFL's, effective CFL light extends further than fluorescent tubes, and the tubes end-up getting in the way. Plus they add to the heat, and can be a bitch getting the bulb within effective range of all of the plants. (some are shorter, some are taller)