What are the materials, for example transparent films, or liquid, to absorb and reduce energy of the blue components in LED light outputs, especially the lower wavelength portion? Where can I buy small samples of that for color manipulation experiments?
I noticed the spectrum of LED lights tend to have a trough between blue and green. Are there any techniques to make the spectrum of LED lights more continuous?
Let's assume the color accuracy is not in important.
Practically all LEDs have a spectrum that's heavy in blue, lacking in green-turquoise, and lacking in the really deep red, but they're gett