its FINE, good pocket light, ok price, and hey if it works , and your happy with it, then the only problem is them stupid little batteries
and if its used Intermittantally like any key light usually is, even that wont be a problem.
but from your link, dont belive this guys explaination of the science behind it
""Well, to start with this is an LED light that never needs to be replaced. An LED is just a blob of glass with some bit of gas in it and a couple of electrodes ... something like a mini-florescent light without the cheap, leaky end pieces. Now, the gas gives off certain wavelengths of light and these folks apparently have chosen just those gases which give off only visible light. There is no heat. That's where the energy savings comes from. NO HEAT at all as far as I know. ""
it aint glass.
it is similar to a florescent only in the respect of it using phosphors, it is opposite of florescent when it comes to its voltage and frequency stuff, florescent being high voltage, leds being low.
they dont really last 100,000 hours without the phosphors degrading.
and i dont think they have any gass in them. they are more like an electronic gate, like some of the semiconductors.
they do put out heat, and that style, the heat has a tendancy to route down to the metal leads. and in that flashlight probably into the body, and batteries.
lots less heat than a incadescent, but leds are not cold.
and his 9 DAYS test, was not the smartest thing in the world
with the TINY ALKALINE batteries, intermittant use of it would be bright each time.
Resting the alkalines in between uses would keep it being bright during each limited use. and it will also use more power at each intermittant use.
as opposed to draining the batteries in a non realistic test for that style of light.
just so that is clarified, not because it matters.
see also
De way Leds work
just so somone doesnt get the wrong info