I went to a knife making event a year or 2 back and one of the gentlemen there had an E1E that he was showing to folks. Lots of output, little package, great looking beam. Far better than any maglite or energizer that I saw, and I was actually impressed for a gas bulb. Believe me when I say, I was happy to land both aspects of this light. I only shined the incan in the dark basement, but it was a very impressive light output. I just wish the runtime was longer. If it were, I would probably make it a primary bulb.😎
BTW, the only thing I understood was 6P...LMAO!
Okay, quick helpful breakdown...
Surefire's incan lamp assemblies that will fit in your light are:
P60 (60 lumens, 60 minutes, 6 volts)
P61 (120 lumens, 20 minutes, 6 volts)
P90 (105 lumens, 60 minutes, 9 volts)
P91 (200 lumens, 20 minutes, 9 volts)
They all share the same form factor and will fit in any of the C/P/G series of lights from Surefire, however, powering them is a different story.
The 6P, C2, G2, and M2 are all 2 cell, 6 volt lights, designed to work with the P60/P61. You can physically put the P90/P91 lamp assemblies into these lights, but on regular CR123 batteries they won't run. What Brigadier suggested is to use an aftermarket assembly from Lumens Factory (
http://www.lighthound.com/Lumens-Fa...ssembly-for-SureFire-C-P-Z-Series_p_1006.html) with two 3.7v rechargeable lithium ion batteries from AW (
http://www.cpfmarketplace.com/mp/showthread.php?t=191277). As you can see, this gives you a real incandescent pocket rocket - 380 lumens for about a half hour or so on rechargeable batteries.
As far as the Malkoff vs. cheap dropins question, I have used both, and the reason I wholeheartedly recommended the Malkoff was because of its build quality. The potted electronics will be far more shock resistant (suitable for use in weaponlights) than the cheaper screw together modules, and the extra mass of the Malkoff dropin and the tapered shape allow for better heatsinking. The reason I linked that particular dropin (M61L) was because it is regulated at a high output level for a long period of time - a great balance. I would question the output numbers for the cheaper dropins, as not all of them have the same quality/level of regulated output, and some of the output numbers are based on extrapolated figures from the manufacturer's specs - not actual measured output (as you get from manufacturers like Malkoff and Surefire).