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Thread: Orange vs. Amber

  1. #1

    Default Orange vs. Amber

    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?

  2. #2
    *Flashaholic* Illum's Avatar
    Join Date
    Apr 2006
    Central Florida, USA

    Default Re: Orange vs. Amber

    I think Amber's Orange shifted slightly towards red

    good question

  3. #3

    Default Re: Orange vs. Amber

    You can try the Manual on Uniform Traffic Control Devices (MUTCD) available as a pdf download here:

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


  4. #4
    *Flashaholic* IsaacHayes's Avatar
    Join Date
    Jan 2003

    Default Re: Orange vs. Amber

    Generally orange leds are orange-red. You need amber for such an application.
    Mags: 2C: R/O, True Cyan, UV. 3C:Penta-XR-E Q5, Single SSC P4. Nitecore D10, Fenix LOD-CE, ArcAAA

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