Growing Outside In Winter

Say you have a greenhouse or coldframe. You have artificial heat. Could you grow outdoors in the winter. In Illinois. The plants would never freeze. What do you guys think

I'm thinkin the light cycles would be off, since its already past the autumnal equinox, and the days are shorter than the nights... Maybe if you started a few indoors and then moved them outside to flower, or you had a mom and cut clones to put outside. Either way, I don't think you can veg outside.

Correct me if I'm wrong.

Sorry I forgot to add that. They would be put outside only to flower. They would be vegged indoors. I think it would work but I wonder how intense is the light.