I understand that you want to keep those plants alive throughout the winter. Your plants look healthy and happy. They also look like they are week three of flower. You can still keep your two plants alive throughout the winter, but you have to start THE DAY you read this.
I love that your plants are getting real sunlight, but you have to ensure that those plants get at least 18 hours of light every single day starting now. If you can give them 24 hours of light every day, even better.
I grew a clone in the corner of my living room over winter. It got natural sunlight for a few hours every day and was right next to a lamp that I left on 24/7. It was NOT a really healthy plant, I just needed to keep it alive until spring. I up-potted her in the spring and she grew into a beautiful little tree.
I’m going to find a pic…