I've hear the same thing BK....it just helps them dry quicker. Also, shutting off the light for 24-36 hours refers to going from veg to flowering phases I think. Shutting off the light for 24-36 (I've heard different things) when switching from veg to flower reduces the flowering time and prevents the plants from stretching (plants usually almost double in size during flowering). This is what I've heard at least.