I would just make sure you take off the AG hood, I have heard the news one have a latch or something you undo and it should come off, i broke mine off completely, its alot easier to rig it up over the plants you can can raise it as much as you need to
DayLight for vegging, and SoftWhite For Flowering
They will about triple in size during flowering, so they will out grow your extension on the AG, so i would look into hanging that bad boy before you flower, They plants will show sex within 2 weeks, The males usually show first so if anything, you should have a good guess which are females after that point