As the title says, I am just wondering if there is any difference?? when using a 400w and now i am adding a 600w to 11 plants, I am wondering would there be a light difference over the 400w side?
I have a 400W and a 600W
I use the 400 for veg with a MH bulb
and the 600 for flower with a HPS bulb.
its awesome!
use them both to finish out your group...
but afterwards...consider breaking them up.
that way you can always have some ready to flower...and always have some flowering...