Don't bother with auto's if you are a regular on this site i'm known for hateing them.but i would get the box up and running with 24 hours of light this is what i did before i came to my senses.i realy can't get it into my head that any one would want to grow a auto for 8 week to get 1 ounce if they are lucky,just take the clone's early of the original strains and then you only have to veg for 2 week at most any how dureing that 8 week the original strain not the auto shyt will produce 4/5 time the ammount.but the answer to the question is put the autos on 24 hour of light all the way through this is what i did when i bought some of the gimmik weed and i got 1 and harf dry.but the experiment that i did was take a clone the same day has i started the seeds.by the time the seed was in soil the clone had got it's legs so i put them side by side and contiued with the grow by the final week the other plant was 20 times the size,but i know that the auto lovers are going to say is that the auto plant is meant to be like that a dwarf strain.i got more of 1 brance than i did the dwarf ak47 by the way they were both the same strain.the bigger sisster was alot stronger than the auto.it is worth a go at these auto plants just the 1 then get back into growing the real macoy.get the lights has near to the auto has possible inces away.good luck what ever you grow but remember to make at least one go hermi on you if you don't want to be buying more seeds,even saying this makes me laugth makeing a plant go hermi to get seeds,this could wipe out all your grow if one of the pollen sacks opens[madness]get with it dude and get your self some real monster ak47's the plants that you just love to look at so much when they have big massive crystal's looking at the ak i have just done looks like looking through a diamond cave thousands of little thc head just amber with the odd one glissening like diamons.