What do you do with your blooming potted plants when it starts to freeze outside?

I have some beautiful geraniums that I have nurtured for two years from when they were a single stalk with one or two blooms on them. They have become massive and were on my front porch. What do I do now that they are so huge and it is freezing outside? I brought them in, but I’m afraid they won’t get any light by staying in.

I need some solutions….last year they fit on a windowsill, but this year they are just too large. Thanks!