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How can I measure the wavelength of a red LED?

by codificadesignstudio | May 07, 2020 23:32 07 May 23:32 | #23573 | #23573

Help me with this. How can I measure red LED wavelength?


We've had community members use the Lego Spectrometer ( to measure LED spectra in the past. Here is an example of someone comparing different lightbulbs, including an LED bulb (

This question ( has an answer from @cfastie that might be useful as well.

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