There are two versions of the Pelican M6, one is a std. incandescent light and the other is a 1w Luxeon LED.  The one you mention soulds like the std.  incandescent which would be quoted at around 20k candlepower.  I'm not being exact here but the cp ratings arew somewhat bogus as it's a measure of intensity at the tightest focused point.  That rating is of little value in a tactical aspect, what you want to use is lumens rating which measures overall output of a beam, meaning the amount of brightness and flood.  The M6 has a quoted of 70 lumens and in comparison to Surefire 6v P60 based light it's a solid match up and maybe even exceeds the P60 lamp slightly.