| [GMCnet] LED lights [message #153805] |
Tue, 20 December 2011 19:41  |
glwgmc
Messages: 1014
Registered: June 2004
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Interesting, Greg, that the human eye has twice as many green receptors than red or blue......
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com
541-592-5360
www.southernoregonguild.org
www.siskiyouguild.org
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The human eye, is most sensitive to the yellow portion of the visible
spectrum - this is why deep red and blue is often used to let people see
what is going on in dark areas, without disturbing their night vision.
This makes both blue and red useful for cockpit lighting at night, but blue
being further from yellow than most commonly available reds, is often more
effective.
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] LED lights [message #153840 is a reply to message #153805] |
Tue, 20 December 2011 23:42  |
Greg and April
Messages: 263
Registered: December 2011
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Senior Member |
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I couldn't say one way or another about the number of M cones as compared to
L and S cones ( not saying it isn't true, just not something that I have
heard before ).
The theory that I have heard is that because M cones and L cones have such a
broad range of overlap that together give almost a plateau of sensitivity
from about 530-540 nm to about 620 nm, which accounts for why the human eye
is most sensitive to yellow-yellow/green light, where as the S cones that
are sensitive to blue, peaks around 430-450 nm where the M and L cone
sensitivity has dropped to almost nothing. Not only are the individual
peaks wider for the M and L cones, they are also the broadest, spanning more
than 250 nm of color sensitivity, where as the S cones normally span a
little more than 150 nm of sensitivity.
.
Greg H.
"Your health is bound to be affected if, day after day, you say the opposite
of what you feel, if you grovel before what you dislike... Our nervous
system isn't just fiction, it's part of our physical body, and it can't be
forever violated with impunity."
Doctor Zhivago
----- Original Message -----
From: "Work Jerry" <glwork@mac.com>
To: <gmclist@temp.gmcnet.org>
Sent: Tuesday, December 20, 2011 18:41
Subject: [GMCnet] LED lights
> Interesting, Greg, that the human eye has twice as many green receptors
> than red or blue......
>
> Jerry
> Jerry Work
> The Dovetail Joint
> Fine furniture designed and hand crafted in the 1907 former Masonic Temple
> building in historic Kerby, OR
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