Sue, that IS a great idea, and I had actually thought of it before I read your post. Because at first, I thought JamesT's suggestion was really good, but then I thought that, knowing me, it would be REALLY easy for me to put the seedlings out one night and completely forget to bring them back in. And even one night of, say, 15 degree temps would probably wreck my tender plants!!! So then I did think that maybe just switching them out with the ones under lights would be a safer idea
I think I'll only have about 10-15 that I can't fit upstairs under the lights, so it shouldn't be much of a problem to do that.
You know, sometimes I get upset when I see all the hurtful, harmful things on the internet. Then, when I come to a great site like ATP, and see how people put their heads together and offer all kinds of great ideas to help someone with a problem, I think what a wonderful, amazing tool it can be! Thanks to everyone for sharing your great ideas with me!!