100w cfl harvest - have a look ?

roughly speaking, how long to let them hang like this?

and should i keep a fan on and keep them in the dark for drying?

Yes and yes

A week to ten days for sure especially with the long stalks. I'd manicure them now too but that's just what I do. I don't use any fans as I have low humidity but the dark is best I agree.

It's good to have a fan circulating air. But you DO NOT want the fan blowing directly on the buds.