Green LEDs

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FredM

Enlightened
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Mar 7, 2005
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Houston, TX
Are there anything besides night vision green LEDs are good for?

I found a good deal on an A2 but am holding off because it is the green model.
 
Not to burst your bubble further, but green destroys night vision just like all the other colors. Only red, and a dim red at that, will maintain your night vision. Many online sources indicate green being good for nightvision. What they are doing is capitalizing on the many "special forces" army shots of night vision devices that make everything look green.
 
Green is used in conjunction with night vision technology, but red is better for preserving human night-adapted vision. I'm pretty sure that green LEDs have more lumens/watt than other colors, since that wavelength is where human vision has the highest sensitivity, and because green LEDs are a more mature technology than blue or white.

However, the whole point of the LEDs in the A2 is to provide a low-power alternative to the incandescent beam when you don't need much light. Getting the maximum lumens isn't too important here. I would lean towards white because of the versatility you gain.
 
The only advantages I can think of are the coolness factor (not to be underrated here on CPF) and the fact that green leds are brighter than whites. But the price you pay for that is most everything appearing a mono color.
 
IIRC, our eyes perceive green much better than other colors.

Are greenLED's cool or what?? ;)
 
I bought a cyan LuxIII from Isaac for use in an ALeph 3. (Ok, not green, but pretty close.) Using binoculars, I can make out a man at the edge of my field 800 m away. Extremely effective for seeing at max distance through clear air.

Scott
 
So I found a A2 at a price I would jump for joy if it was white.....any reason to pass because they are green?
 
beezaur said:
Color rendition is crap with green.

Scott
Click to expand...


Is color rendention a big thing for you? What about for just a walking around light, its seems the green may have a small advantage here as green gives more visible light to the human perception.

Wow I really want this to be usable. Anyone have a beamshot of a green LED?
 
I really don't care what any study says about red vs. green and am actually tired of people telling me about the eyeballs in "my" head!

My preference at night is for green - I can see better with green than with red. I do use red now and then - but all I can say is that if my eyes could talk - they would pick green.
 
Well if you want white, and want to save some money on the "good buy green" one, and can mod things, you could always take it apart and put whtie leds in ! Nichia CS would be durable and brigther than stock white.
 
Get a CPF edition Eternalight Elite Max and change the LEDs however you wish at anytime you wish!!
 
Sigman said:
I really don't care what any study says about red vs. green and am actually tired of people telling me about the eyeballs in "my" head!
Click to expand...

Ah! Personal preference! Yup, my wife, for example, somehow can't easily estimate distances when using red LED's. It's like she's lost her depth perception; doesn't happen with other LED colors.
 
One of my A2's has green LEDs. Stock from SF the rings are terrible, but if you sand the LEDs this becomes a really useful light. I've since come to appreciate the usefulness of green light. I would say it is better for navigation through the woods than white LED light. It does help with contrast and for that it makes it easier to pick your way over terrain. True it is monochromatic color, so it won't work for reading maps and such. Get it if you will mainly use it for navigation. If your uses are otherwise, then wait for a white one to come along. :)
 
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