Make sure there's holes in the bottom of 'em too.

Next time you transplant, put a layer of rocks or clay balls at the bottom to help the roots breathe.

They will not need a lot of light now, but soon they will. You could start looking around for fluorescent lights. Any will do, but specifically, a T5 at 6400K would be the perfect light right now.

Also, keep an eye out for lights or bulbs that are around 3000K, because they are good for flowering.