chrome,
Considering you are looking at brightness and runtime, this suggests to me that you will use it as a "work light". Something that has enough punch, will have a 90 minute plus runtime and run on alkalines, NiMH or lithium AA cells.
I went with the Peak Mediterranean with 2AA body. Normally, I use the Kroll clickie switch but change it to twistie when camping or harsh use (when it HAS to turn on!) It is as bright as my BB500 R2H 20mm IMS equipped minimag but handles the heat much, much better. I've run it for 2+ hours on NiMH and it was warm, but not hot so I consider it reliable enough to be my work EDC light. The LuxeonIII LED underdriven at (guessing) 500mA for around 1.5 watts or so of drive allows decent runtime and great brightness.
Yes, it costs twice as much as an L2P but I never have to worry about it not turning on. No clickie failures, no corrosion on the barrel etc of my L1P. No overheating and corrosion problems on sandwich equipped minimags or switch failures of Aurora 2AA Jupiter lights. An added bonus is it will strobe when the regulation starts to kick out as a reminder to change the batteries.
An added bonus of the Med is it fits minimag holsters. The larger head not only cools better and allows for a larger reflector but fits my Ripoffs holster. My Med is not sexy but is a reliable tool that is waterproof and fits all my needs as a work light. My BB500 R2H reflectored minimag is a shelf queen now. After three years, the mod has been retired.