How long would you recommend letting vegetative go for?

originally this screen name was to look like:

d/dx sin(x) = cos(x)dx

Using tan, I would have had to involve secant.... try explaining secant to someone who knows nothing about trig.

Yea, im a math dork.....
ddxsinxcosxdx Reviewed by ddxsinxcosxdx on . First time, having problems Here is my situation: Closet setup, am using a HID florescent ballast for the growth phase then will switch to a HPS bulb for flowering. I have been running the florescent setup 24/7 for a little more than a month now. Plants are beginning to reach a foot tall. Started the seeds directly in standard "kegger" red cups which i cut holes in the bottom for drainage. I will be transplanting to a 6" pot once the plants start to show gender. (will also switch to HPS 12/12 at this point) Rating: 5