Dumb question about flowering time

Hi, I have a totally stupid question about flowering time...when I bought beans some would list a flowering time, 50 days, 60 days etc. Is this 50 days from when they sprout or 50 days from when you change the lighting over to 12/12?

50 from when u change light cyclle

from when they start to flower, but dont believe a word, they r done when they r done.

I'm just having trouble figuring out when they'll be done, some are miles ahead of others in my grow...

u need to hit up radio shack and get a 12 dolla microscope and u should kno wut from ther

Oh, I've got a microscope, I'm just wondering what's the earliest they can be ready? I have one that's been flowering just over 2 weeks and has huge buds already, while others are just starting to show...

u got atleast 9 weeks

Don't listen to the list, listen to your eyes.
Use the microscope and when they are mostly cloudy (head high) or amber (body high) then harvest.
Your choice.. and what a choice indeed.

The earliest woul be when 1/2 the hairs are dead.