Friday, December 9, 2011

Fiat Lux LED

And God said, Let there be light: and there was light.
-Genesis 1:3
I've been very impressed lately with LED flashlights. We have two giant incandescent flashlights that use multiple D-cell batteries and recently, when I needed them at night, the output was useless as the batteries were old (not dead, just old). I got better light from the LED I keep on my keyring. The old flashlights are more useful as a weapon than for lighting the dark.

According to Wikipedia,  in 1999, Lumileds Corporation introduced the Luxeon LED, a high-power white-light emitter which was used in the first LED flashlight, the Arc LS, in 2001. LEDs can be significantly more efficient than incandescent lamps. An LED flashlight will have a longer battery life than a comparable incandescent flashlight and LEDs are also less fragile than conventional glass lamps.

Our two D-cell flashlight produces on the order of 15 to 20 lumens of light. A small LED flashlight operating on an AA cell can emit 100 lumens. 5 times brighter with less power!

Bottom Line

LED flashlights would be a great holiday gift. We saw a gift box of 4 for $20 at Sears. My wife says she'll buy when they are discounted 50%. She got lucky once with a LED flashlight at a Dollar store but has not seen them there since. On Amazon.com there are many LED flashlights for under $20 and some under $10. I don't yet see the value in LEDs selling for $100 or more.

P.S.
Fiat Lux in the blog title is the Latin often used for Let there be Light, perhaps the most well-known phrase from the Bible. [Wikipedia says Fiat Lux actually means "let light be made" and that "Lux Sit" is a better translation in Latin but C'est la vie.]

γενηθήτω φῶς (or genēthētō phōs) - Greek
יְהִי אוֹר (yehiy 'or) - Hebrew

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1 Comments:

Blogger sokalsondha sondha said...

Led Flashlight is the best type of Led Flashlight on the market and is considered to be the top technology when it comes to using light in dark places. You can get these type of Led Flashlight that you use by holding them in your hands

April 20, 2016 at 1:08 AM  

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