Now twist the wire on your label around the enclosed ball. Stratification of your seeds may be new to you, but it is important even if you intend to plant outdoors when weather permits instead of growing under lights. Heat and dryness kill seeds, so why not do the way the experts do and your percentage of germination will be higher. The seeds that are stratified can remain safely in a vegetable crisper for a long time, at least until all danger of frost is past in your area if you intend to plant directly in the garden. This is very easy now, for the seeds are ready to, start growing right away and your labels are all made so you just make your row or rows and distribute your moist seeds, with the damp mix they were in, covering with a half inch of fine moss.
Some people place a plate of glass over the seeds until they sprout.
If you can't wait until all danger of frost is past you'll need to provide a suitable environment indoors. You do not need a greenhouse. Fit a new plastic sandwich bag over the top of the pot, snugly. So now each group of seeds has its own little controlled environment. In providing adequate light, I have never found just a window sill and natural light enough in our climate.