The idea actually came to me when I was putting away some decorative LED rope lights during the holidays and I noticed they were slightly warm. Perfect temperature for gently warming my seedling containers!
-Simply string the rope lights back and forth in rows along the shelves and sit the water-tight seedling containers on top of them. No need to tie the lights down-the weight of the containers holds them in place.
-Most seeds don't actually need light until they have germinated so just move them to the grow lights once they have sprouted. .
Make sure you read the label on your lights. MIne says it's fine to leave them on but do not ever submerse them in water so I make sure all of my containers do not leak.
More details on my blog including my inexpensive DIY grow light setup: http://www.empressofdirt.net/easy-homemade-he...