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Its a narrower bluer beam on the Arisaka. Its 300 lumens. The Surefire has a smoother beam, more spill... and thats the 300 lumen version. The 500 lumen version smokes Arisaka for spill and output.
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The 500 lumen m300c has a lot of spill, but no more throw than the older 300 lumen version.
The E1T Malkoff heads put out significantly more than the listed specs since Gene is very conservative. We'll be updating the numbers once he does in the next month or so.
All three lights side by side, the E1T has the most throw, although the beam color is cooler. Personally I prefer a warmer color. I still see more spill on the E1T versus the older 300 lumen m300c as well, over several samples of each.
Everyone does these comparisons or calls it the Arisaka, but you're really comparing Malkoff against Surefire. We just make the body and tailcap. :)