It depends on the strain. I have had some photos flower at 16 hours.
You can expect a sativa photo to get 3-5 feet when doing12/12 from seed.
.8 gallon is the smallest pot i fuck with. you can “get away” with what ever you feel to care for.
Photos need a lil less nutes than autos to keep happy but thats a BS answer. So many things depend on so many things. here is my 12/12 from seed am just finishing up on.
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