is she ready????

so got this purple power going bout two months in veg. is she ready to induce flowering dont want her to be to big....

The first time you grow a strain, let it get to a third of the height it can safely reach under your flowering light/s, regardless of how mature it looks. It should grow 2-3 times it's size from the day you start 12/12, generally speaking.
Bear in mind that even a powerful hps light can only penetrate about 3 feet of canopy, so letting the plants grow larger than this will result in the bottom parts of the plant producing very little bud.