The best method for most people will also be the simplest for them to use. Don't set up something complex if you don't really know what you're doing. It's not hard to grow this plant, but screwing it up is even easier. The power used for 18 hours will cost a little more but will be worth it. You should only use 12 hours when flowering. If you want, maybe you could reduce veg lighting to 15 hours. Just grow in soil, is my opinion. Pick what's easy to do.