118 of 124 people found the following review helpful
A solid performer,
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This review is from: Fenix E21 154 Lumens Flashlight (Sports)This isn't your cheaply Made in China junk; it's high-quality Made in China junk.
Seriously though, the machining and finish are top notch, and is what I expected. The only thing that has me curious though is the high/low setting. The manual sez high is 150 lumens and low is 48 lumens.
However, you can hardly tell the change in intensity from the two positions. Either the light is super-efficient at low power, or low power is much more than 48 lumens.
I like that it is IP-x8 (IEC Standard 60529; Ingress Protection; adopted by ANSI-60529). The first digit "x" in the IP rating is the protection against foreign objects such as dust, and x = "not specified", or "don't care". The second digit '8' is the highest waterproof rating and means "Waterproof when immersed beyond 1m".
For those of you that are not familiar with them, the IP waterproof ratings are as follows:
0 = No Protection
1 = dripping water
2 = dripping water tilted up to 15 deg.
3 = spraying water (water spray tilted up to 60 deg).
4 = splashing water
5 = water jets
6 = power water jets
7 = immersion in water up to 1m
8 = immersion in water beyond 1m
If you want detailed information as to what those descriptions mean, google IEC 60529.
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Showing 1-8 of 8 posts in this discussion
Initial post: Jun 12, 2011 12:20:44 PM PDT
Posted on Jul 26, 2011 6:28:52 PM PDT
The human eye perceives light on a logarithmic scale, so in order to make a flashlight "look" twice as bright, there needs to be much more than twice as much light. The easiest way to see a difference in light levels is to see how bright it is at greater distances. The 150 lumens should go much farther than 48.
Posted on Sep 29, 2011 10:27:52 AM PDT
B. Speer says:
Wish I could put this notice on all the Fenix flashlights: When in the "strobe" mode you get the highest lumen power AND about twice the burn time because it goes on and off. Up close the blinking light is unpleasant but viewing any distant objects that flashing strobe effect almost disappears while you use only half the battery drain. Try strobe setting from fifty feet or further I think you will like it.
Posted on Nov 25, 2011 11:38:25 AM PST
"This isn't your cheaply Made in China junk; it's high-quality Made in China junk. " Lol - thanks!
In reply to an earlier post on Feb 26, 2012 8:58:27 AM PST
Last edited by the author on Feb 26, 2012 9:00:31 AM PST
The Sparrow says:
For those who don't know: logarithmic means the increase grows very slowly, log 10=1 log 100=2, log 1000=3...
In reply to an earlier post on Feb 26, 2012 10:23:16 AM PST
Actually it is the Inverse Square Law, in that as the distance doubles, the light intensity is reduced by a factor of 4.
Posted on Mar 14, 2012 11:40:32 PM PDT
Last edited by the author on Mar 14, 2012 11:50:38 PM PDT
Robert C. says:
I too thought there was no difference or that it wasn't switching between low and high modes either when I first used it... that is until I put brand new alkaline batteries in (or freshly charged NiMH batteries). Wow, what a difference! Loosen the top just slightly (counter-clockwise twist) and it switches into low, tighten it back slightly (clockwise twist) and it switches into high. The switch does work and there is a huge difference between the two modes! Bear in mind that the circuitry in this flashlight constantly monitors the battery voltage and output level and it decides whether or not the batteries are capable of supporting the high mode. If the batteries are low beyond a certain threshold, then the flashlight cannot switch into high mode and it will remain in low mode. It's not just a dumb switch.
In reply to an earlier post on Dec 26, 2012 7:28:47 AM PST
Last edited by the author on Dec 26, 2012 7:29:19 AM PST
The inverse square law deals with the dispersement of energy as a wave travels outward -- while a good approximation of energy after a certain distance, Sparrow was referring to THE EYE's response to light particles.
It is still maintained in the scientific realm that the eye responds to light in a logarithmic or exponential way.
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