true but ya can also flower under 14 hours on some varieties, Ya can't keep the poor little babies inside till its just a little bit warmer?Can yea, but the hours are climbing fast after that point - not going backwards.
whats the advantage of putting them out earlier when they are going to go through the whole summer cycle anyhow?they will adjust to light outdoors, sometimes going onto flower, then revert back to veg. don't worry, the roots are well established by this time and they take off.