how far along is it?

this is a purple kush auto. Its 4 weeks from seed. But its giving me white hairs and starting to form bud. I wasn't expecting it this soon so I'd like to know how far along it is. This is my first grow so i cannot gauge it based on looks. Anyone able to help me out?

I'm guessing about a month. Maybe a week or 2 after a month.

But it's only been about a month since it was planted. It was planted on 8/10.

You must have it under pretty good light, if that's the case, and about 12/12 also from the time you germinated them?

It's been on 24/0 from germination.