3 600watt lights

Ok so I'm about to replace my 400 watt ballast with a 600w dual ballast along with the 600 I already have, so my question is how many plants can I have under the light and how much yield should I figure...its all in dirt running the humboldt nutrient organic line, currently growing 3 blackberry kush, 1platinum, 1 purple mokey ballz, 1 purple cream, and 1 blue dream. Thank for any help

If you follow the 50 watts per square foot rule than you have enough lighting for 36 square feet. You can fill that space up with a bunch of little plants or a few big plants. Your veg setup and plant limits will determine that. As far as your current yield is concerned we have no idea. No one will be able to give you any sort of reasonable estimate.

As for long term estimates if you get to 1 gram per watt I'd say you are doing great. If you can get to 1 gram per watt then you can look for a super heavy yielding pheno of something and then go for 1.5 grams per watt. That's about as high as I've ever seen anyone get.

i've heard a lb per 600 watts but im sure 600grms per 600 watt is correct as well, around that ballpark. are u gonna star a thread for ur grow?

Ok thanks guys....and as for the thread for my grow probably not currently have no comp and keeping up to date tabs will be slightly irratating on my phone..haha but I will try to stay posted if any one is interested...still a semi new grower though haha