I am going to try and put this as short and simple as I can and is it from experience.
Just bring the plants in after the day is done and only if it is going to freeze or get way cold like in the 30's.
Or bring them in anyway it wont matter.
Don't worry about it they will be fine and no they dont need to go back under the lights at all.
In all honesty if the weather is fine during the day I would put all of them out there and be done with the lights.
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