Quote Originally Posted by RackitMan
At least newbie Ed Rosenthal understood and now recommends 24 hours of blue LED throughout the entire grow cycle.

I am amazed at the close-mindedness and lack of understanding of cannabis photoperiods or real attempt to understand something new.
Hey RackitMan, could you please supply me with a reference to where Ed Rosenthal now recommends 24hr blue LED throughout the entine grow cycle?
I started searching and have been unable to find this, I really would like to read it all in context to better understand what he is saying and any reasoning behind it.

As to understanding of photoperiods, let me show you by correcting IR's statement (and other's belief) that "flowering onset is triggered by the hours of light...". This is wrong, the amount of light or duration of photoperiod has no effect on flowering. It is the amount of dark period that determines when a plant flowers and if it stays in flower. During the dark period certian hormones (and enzymes) increase in the plant, when they reach a certian level they act like a switch to trigger the plant to go into the "sexually mature" stage (flowering). Aprox 8hrs or less of dark means the plant will stay in the "immature" stage or vegative phase, aprox 10 or more hours of dark and flowering will occur. BTW; the hours of dark to get a plant to trigger and hours of dark needed to keep it in flower can be different.

I try to learn something new everyday, and am always open to new ideas...hell I've been experimenting and using LED technology for over 2 years, in spite of hearing "led's don't work" from people the entire time. Share some additional info, inquiring minds want to know!