Heider CFX "750m throw"
Happen to see this Heider CFX flashlight.
The special thing with this relatively small flashlight is it can throw 750m as claimed by the manufacturer. 750m can be translated into 140,625 candela.
Is it possible? I don’t know but here are some of its descriptions and my thoughts:
1) XM-L2 (unknown bin) LED, without dedome I safely presume?
2) Only 31mm head diameter!
3) TIR optics. I don’t have experience with TIR optics but I don’t think it is the ideal design for ultimate throw while being efficient?
4) At the price of $89.90 it is not too expensive if I consider it at the same level as Fenix, Nitecore, Olight… etc. But at this price point I also don’t think it has wavien collar to make it throw tremendously better without dedoming the LED.
5) Other assumption can be overdriving the LED real hard… but how hard can it take with only one 18650? Over 6A?
The manufacturer however keep claiming that their 750m is real in their website. To me it is not so possible, at least for today’s technologies, unless they do not measure with the ANSI standard (where the light intensity left 0.25lux) but until, says, 0.1 lux?
What say you?