It's possible. I am getting around .4 gpw from my past 3 grows with cfls not sure how my latest will turn out but you should be able to get 3-4 oz off 260. Training is key and veg time should be a lil longer, keep your canopy level unless you want to surround your plant in cfls, do a lot of LST and topping and you should be able to get close to that. Don't be disappointed if you get closer to 2-3 on your first go though.