Well I feel like a friggen dipstick. I realized that first article I linked is for 24 hour lighting. Once again, skimming bites me in my ass and that will be deleted from my favorites. It did much good however because it sent me on an afternoon-long search to find the truth regarding light schedules. I was less concerned with what the scientists said, and more concerned with what peoples actual experiences have been.

Conclusion: There is no one correct answer among weed growers. In general however, there seems to be a few things people are agreeing on. For one, it is best to roughly try and mimic mother nature. An occasional kick in mothers ass from time to time is OK, but these kicks often tend to start stacking the odds against optimal harvests. Long story short, the later in a plants life you continue 24 hour lighting, the more chance of abnormalities or problems such as hermaphroditus. Also, 24 hour lighting decreases root development. This is very bad, but it can be used for good. For example, some people use it for their mothers so they can keep them a long time in one container without the plant getting root bound.

Most of the people like you and me that have done some actual side by side kind of experimenting in this area, rarely say that they have noticed much difference. Many of those people do however, agree that 24/0 lighting is best for seedlings, but shouldn't be used much later than 2 weeks.

I hope that helps your decision, if it hasn't already been decided. You've probably already done your afternoon-long search about photoperiodism.