You need to have your seedlings in light 14-16 hours a day. Put them so they
are always about 6 inch's above the plant. Higher than that and the plant
will grow spindly. Seedlings should always be watered from the bottom, not
the top. Watering from the top will damage the root system. Soaking them in
a pan of water till the pot is wet will work best. At the first leaves
appear pull them out from under the cover. If you don't you might get mold.
The temp soil of your plants should be 70 to 80 F.
Have fun
Michael Missouri - Master Gardener Zone 5A