MN60 ~225Lu/60min
MN61 350Lu/20min
N62 500Lu/12min
The lamp life for these type of lamps is roughly 20-30 hours depending on the individual lamp, the way you use it, and whether or not you have a spare.
Best performance? The N62 has a gorgeous beam, awesome at range, brilliant white - However, not intended for constant-on use, or general illumination.
I use the MN61 in my 12PMT & M4. I like the beam, the output, and the runtime (ability to maintain a brilliant white beam) is far better then the N62.
Al