need to start flowering when should i start the 2700;s

need to start flowering when should i start the 2700's

im in the middle of a 12/12 with 6500s but when should i start the 2700s after 12 hours dark or can i switch em out now or do they need a 24 hr dark per than i start with em >?

My friend changes to 2700k's when he changes the light to 12/12. Im assuming the faster you switch to the different spectrum it will coax your plant to flower even more. So in a nutshell i would change spectrums ASAP. Good Luck hope this helps

wait i might have missunderstood your post. Did you start the entire grow using 12/12 light schedule? If so i would wait till they show sex and then change light spectrums

started at 24hr than went to 18 a few days than went to 12