how i know watt of LED instead of LED lumens ?

Discussion in 'General Electronics Chat' started by green90, Sep 30, 2016.

  1. green90

    Thread Starter New Member

    Sep 3, 2015
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  2. Sensacell

    Well-Known Member

    Jun 19, 2012
    1,129
    266
    Watts is not a photometric measure of light output.

    The battery voltage is irrelevant.

    Lumens is what is important, it's how you actually measure a lamps optical output power.
     
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  3. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,685
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    This table from Wikipedia gives an approximation based on minimum assumed efficiencies. As mentioned, converting watts to lumens includes an efficiency term for light fixtures.

    upload_2016-9-30_6-32-2.png

    John
     
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