I stick with the 24/0 lighting; my reasoning is that I'm attempting to "season" an annual plant in less time than it's used to. Many on here have said that plants grow the most at night and therefore use the 18/6 schedule. I haven't had a problem with the 24/0 so I stick with it (whatever floats your boat). Grow in the veg stage for a period of time that suits your needs. The majority of growers veg for 1 month, but I find I'm a fairly patient person and I veg for 2-3 months to maximize the number of nodes.