thats funny. the only thing i have ever heard about growth during the dark cycle is that darkness promotes root growth, which in turn will allow the entire plant to grow better. i do 12/12 from seed, and my 2 week old plants are normally as big as a 3 or 4 week old vegged plant. why? again i thought it was because of the above statement. either way there isnt a living thing on this planet that doesnt sleep. sleep is goooooood