600 or 1000

i have a 400 watt light im vegging 10 plants with right now. it does not have a cooltube on it but its helping control the colder temps at the moment. Summer is coming and im thinking of getting a 600w with a hood or a 1k watt with a cool tube. would i get better coverage with a 1000 watt or with a 600 watt and a 400 watt together. I would have to get a cooltube or hood for the 400 watt because the temps will get out of control.

Since you get a cool tube with the 1000 I would go with it. Although 600 and 400 maybe give you better lighting due to multiple light point sources.

I would try the 1000w source m8.

I am debating between the two as well. Leaning more towards the 1000 watt, I want big fat nugs this year man go big or go home