Hi, CC, i watched a gardener's world programme on UKtv the other night with geoff hamiltom, he said to place some tin foil behind the seed tray when growing plants to allow them reflect light, this gives them light all around the plant (and somebody on here was saying the same)
he also said, place the tray, when seeds has germinate, into a box which has been painted white inside and has a clear plastic lid to keep heat in, ;) it can be used as a propagator, inside a cold green house,
hope this helps
windy