Lighting isnt the issue, 600w MH for veg, and a 1000w HPS for flowering..... that lockout was scary tho and with the help of everyone here, especially stinky, they are getting back on track.... i got these four on aug 22nd, so they are about 20 days old, i wont flower until they are about 6-8 weeks old. Since i have a 10 foot ceiling for flowering, i should have plenty of space (the entire second floor of the house is my grow room(s).