Gotta admit that I'm not familiar w/ "GrowPower" brand bulbs- certainly not sure what they mean about " nutritious red light". I suspect that this is a re-pack of a commodity bulb, as the ANSI specs on the packaging are, well, all made up. ( There is no bulb in the database bearing these codes).

I assume that you're looking to flower w/ a MH ballast. The hortilux conversions are pretty good, as are the Agrosun warm halides. Long term, tho, you'll want to get set up with an HPS ballast. My $.02.