200w clf grow. when do i flower?

hey ive got 2 plants in a closet grow under a 200w clf. and was wondering when i should flower to get a good yeild without compromising on rsults. there just under a month old and are about 15cm high

you can flower when you see pre-flowers or alternating nodes,you can wait longer but wait until you see one of those first

you can flower whenever you would like to its all about prefference for you
if you force flower it will take longer to show signs but if it is mature it wont take long to show signs

i usually force flower at a month or three weeks due to height restrictions...just depends how much space you have..

if you force flower it will hurt your yield