Orange vs. Amber

kyazh · Feb 18, 2007

Im working on an automotive project with LED and I'm stuck with choosing the color. In the US, I know we have DOT regulations and such, and I would like to match them as closely as possible. Whats the difference in wavelenght (in nm) between amber and orange? Also, does anyone know the official wavelength for amber? Finally, what is the DOT official wavelength for amber?
thanks!

Illum · Feb 18, 2007

I think Amber's Orange shifted slightly towards red

good question :ohgeez:

beezaur · Feb 18, 2007

You can try the Manual on Uniform Traffic Control Devices (MUTCD) available as a pdf download here:
http://mutcd.fhwa.dot.gov/kno-2003r1.htm

It covers traffic lights, and might specify wavelengths (not sure).

Scott

IsaacHayes · Feb 19, 2007

Generally orange leds are orange-red. You need amber for such an application.

Orange vs. Amber

kyazh

Newly Enlightened

Illum

Flashaholic

beezaur

Flashlight Enthusiast

IsaacHayes

Flashlight Enthusiast

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