hey man, its been a while since ive posted but since im doing the same w one of my best clones in a 12 gal, this is my first inside outside transplant but i read about this a while back. first off from going from inside to outside there are going to most likely be some drastic changes to the pants environment. just sticking them outside and expecting them to do well is erroneous what ive read and what im doing requires a little time but will be worth it.
first id find a place to put your plants while they sleep the first week or so because you dont want to mix them once theve been outside your asking for trouble doing that. that being said its fairly simple start small and work up. start by taking the girls outside for a few min either early day or later in the eve when the sun isnt at full strength. they will almost assuredly start wilting and acting like they need to be watered( avoid misting too much if the sun is intense or you could bake your leaves.
once they have been out for 15-30 min the first day move them back inside and under a temp light for the girls and monitor them to make sure they recover, misting when they come in is a decent idea depending on the state of the girls. the next day stretch the time outside out to 1 hr or a little longer and so on, a week of this should get you to a state where your girls will survive on their own and not get overly stressed along the way. say 30 min then 1 hr then 2 then 4 then 6 and so on provided they seem good with the previous days outside time.
that being said you will still need to watch for pests, wind, rain, and animals, not to mention humans and outside girls are going to need big containers to get full effect and will most likely use more water.
cheers