Nope but there good with a little basil when you get the munchies!
In regards to your 12/12 question, I saw somewhere (maybe here) where a grower implemented a very creative light schedule. It wasn't based on a 24 hour day. I'll try to find the link but basically they reset their timer each day so they would get more light/dark cycles in a week than you would with a standard 12/12. It only amounted to one or two every 10 day period but they claimed it made a difference in flowering growth.
Maybe someone will remember this and post the link. I'm just going from memory but it was like a 10/10 or 11/11 cycle. Sounded like a real hassle but if it works, it may be worth a try.