some growers actually grow all the way through with MH...Especially now that there is such a thing as "Hortilux Blue"...have you checked the spectrum on that baby. I bought 2 1000w MH ballast kits after seeing the Massively broad spectrum it produced

you can use that MH, it isn't as high in lumens, and it will only effect the bud in looks and density, a little.

When you can, add the MH just for the increased light intensity...Imho.lw