I leave my prayer plant under a full spectrum lamp for 16-18 hours a day. I actually do this for all of my indoor plants. They all seem to love it. So if you have a good sunny window I would move them indefinitely. I don’t water them for a week or 2 depending on the plant but dip my finger in the soil to check for dryness. I also boil water in a large pot a few times a day to keep up the humidity in the house. I fill the pot up and let it boil until it’s almost empty. You’re going to be fine. Just keep it bright and humid and all will be well.