I had an ARC AAA Premium modded by LED_ASAP with a Lux I that pulled 400ma from the battery. With an 850 Energizer NiMH cell, it would run about an hour and 40 minutes, then it would start to flicker and drop out of regulation, then it would run a long time at a lower output.
I was 100% happy with mine. Mine didn't have the full 'half dome' mod where the acrylic would actually extend past the end of the flashlight, but it had a little acrylic that looked like a 5mm LED but shaped a bit different. It had a square-ish beam but that was never distracting in over a year of use.
I think back in the day, he charged $80 or $85 for the mod and the lights were $30 to $40. They usually sell for around $60 on B/S/T though I think one was recently sold for $30. Outstanding deal. LED_ASAP did/does top notch work.