I was wondering, my plan of action for growing is to germinate a seed, plant it in a cup, grow it to a few inches in the cup and then transplant it outside. My question is, after germination, when I put the seed in the soil//cup, do I have to have my light on for it to grow? I'm talking about before the plant sprouts, while it's a seedling underground. Do I have to have my light on for it? Just wondering. Thanks.