Electrical – irradiance of blue LED light

ledled strippower electronics

enter image description herei have small rectangular box with blue led strip 450 nm placed on top of the box. what device should i use in order to measure its power density or the irradiance of my blue LED?

Best Answer

  • First specify WHY you want to measure this.
  • Second define exactly what you want to measure along with resolution and accuracy for each wavelength.

    e.g. Is it relative to the Eye or to spectral energy. These are not the same thing.

If you wish to measure the Eye response level then use an Ambient Light sensor which is a PD with Eye spectrum Matching optical filter.


Then consider the ambient light that needs to blocked like a camera with a lens, recessed aperture, focal length and calibrate with a precision distance understanding the sensitivity to positional errors.

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