Quote Originally Posted by faithless
Light cycle
by Ed Rosenthal

Marijuana plants continue to photosynthesize as long as there is light and their other needs are met. They do not need a rest period. Turning the light off for 25% of the day decreases growth rate by 25%. This is actually costly because it requires the plants to spend a longer time in the vegetative stage.


http://cannabisculture.com/articles/2082.html

He is rite, the plant that is supplyed all its nutes it dosent need to rest it like a mechanical device that has full power and ideal conditions to operate, it dosent need to rest.