It really depends on what you mean by equal quality. The M80 ballast is the "industry standard" magnetic HQI ballast that drives DE bulbs. As far as I know, all M80 ballasts will perform equally, so you could get a PFO 250 HQI, or even a raw ballast from hellolights, wire it up, and you'd be driving the bulb about as well as anything. To be honest, I don't know if the geisemann ballast is an M80 or if it's electronic. If it's electronic, you could get an icecap. You might check Sanjay's site to see how the bulbs perform with the geisemann ballast vs the icecap vs the M80. The research I did before buyng a 250 DE mini pendent led me to buy the PFO HQI ballast, although it does draw more electricity than the electronics. From what I remember, the geisemann pendents only performed so-so in terms of PAR.