You're probably right. But that would require purchasing a new ballast and bulbs, which is not something I really want to do at this time. And I like using the 10,000k (blue) bulbs for veg, as I think it helps produce more females.Bet it would be a lot better if you sprung for a MH to HPS conversion bulb.I guarantee they will increase your bud size by 30-40%.But anyway,looking good bro.....keep on keeping on.
FWIW, I am using Iwasaki (EYE) 6500k bulbs for flowering. They are supposed to be the best of the best when it comes to MH bulbs. They are broad spectrum, and heavy in the yellow/red end of the spectrum. They have the highest PAR values of all MH bulbs. So maybe not the best, but not the worst either.
And I will keep on truckin'.