I think it might be that the orange ones might make it from yellow and red, yellow is closer to the most sensitive bit of our vision than red, so you see it as brighter. Its an effect from our vision, not the physics.
Steve
On or around Wed, 21 Dec 2005 18:22:10 +0000, Steve enlightened us thusly:
yebbut, the orange ones look *less* bright than the nominally dimmer red ones.
Maybe its not that colour combination then ? Try the CD spectroscope test,
Steve
Depending how fast the tree jumps out at you they might not always help!
Not all have integrated resistors - especially if, for example, someone is replacing dash panel light bulbs with LEDs, you'd not be installing a kit of any sort.
An elementary introduction to LEDs is available in many places on the web, here's one example some might find useful if you want an introduction to LED technology:
There's four different sorts of light sensitive cells in the eye, three of them sensitive to different colours, and quite a bit of image processing in the optic nerve and brain. So that rather reddish incandescent bulb doesn't look anything like as red to us as it does to a camera.
So that red could be close to one of the local peaks in the curve, while the orange has more total sensitivity, but is off-peak on two colour receptors.
The eye's responses are more complicated than simple graphs can show.
On or around Wed, 21 Dec 2005 21:45:34 +0000, Tom Woods enlightened us thusly:
"warning - heavy plant crossing"
On or around Thu, 22 Dec 2005 16:05:52 +1000, "Karen Gallagher" enlightened us thusly:
depends how you do it. sundry of the typical dash panel bulbs are available.
http://www/superbrightleds.com has LED replacements for several of thesmaller bulbs.
:)
They always seem to cross behind you too...
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