Once they sprout remove the lid, or just remove the sprouted cups from under the lid and put them beneath the light with a little air circulation to aerate the surface of the medium and build stocky stems.Its pretty Ghetto... Styrofoam cups, holes in bottom using a pencil )lots of them(, Theyre in a clear plastic storage box, a few inches taller than the top of the cups with a matching plastic top on the box to seal in the heat. I have a heat mat under them and a grow bulb above.