Uphillbiker, I have the same question about finding quality MR11 bulbs. I bought a Hikari one (same brand as sold by lightbulbs05) last year, and the beam pattern is awful, with terrible dead spots and bright spots. My primary commuter light is MR16 based, but my MTB light is still MR11, and I'm wondering if there's anything better out there. All the bulbs associated with bike light companies (NiteRider, etc.) are rated for either 6V, 7.2V or 13.2V -- not 12V, and everything else I've found is el cheapo.