I'm preparing some babies for the outdoors and wanna know if I can leave lights on 24 hours until they go outside
You can use 24 hour lighting, but make sure you wait all the way till the days are 14.5 hours long before you move outdoors. Plants going from 24 hours to a short grow cycle are more likely to try to flower early than plants that are used to a night cycle. And just a little ps - the reason the grow room smells so great at lights out is actually because the plants are building up turpines over the night time, that they the release during the day supposedly as way to ward off pests. So the highest concentration of turpines (dank smells) is first thing in the am when the plants have been building it up all night. That's why morning is the best time to harvest for flavorful aromatic buds.