[thosevacanteyes]

You can grow under either spectrum. I also do the majority of my plants 12/12 from seed, or 24/0 for two weeks and then switch to 12/12. They usually stand 24"36 inches tall and produce around 2 ounces of dried bud per plant, under a 250w HPS. I grow in water, so the results will be slightly diff. than yours, but if space is an issue I must recommend 12/12 from seed.

-C