I have an older one, it was retasked from it's former role as a backpacking headlight to a helmet / headtube flasher only, supplemental to a proper headlight. It had become too dim for a BP headlight even back then, obsoleted by newer, lighter, brighter headlights.

Even the newer ones that are brighter are not nearly bright enough for a headlight. You want a headlight that gets motorists' attention - a PT EOS on steady would not do the job. I wouldn't use mine for a headlight on a MV-less MUP.