Are MH Conversion bulbs worth it?

Just wondering if you guys have any testimonials about using a MH Conversion. I understand it's probably not as good as a real MH lamp but I wonder if the conversion will make as big of a difference as compared to Veg'ing only with an HPS.

Well it just depends on if you have the cash, because if so, then ideally you should invest in another ballast, or better yet, a ballast that can support both mh and hps. With a conversion bulb you're only suffering a small loss in lumens, though growing with a mh conversion rather than a hps will certainly make a substantial difference.