It’s the semiconductor utilized to make the LED chip which determines the colour. The most common chips utilize indium gallium nitride (InGaN) to produce blue LEDs and gallium-aluminum-arsenide-phosphide (GaAlAsP) to create orange, yellow, and green LEDs. The visible spectrum is comprised of a wider spectrum which the phosphors create. The CRI measures of the accuracy …
LEDs in Microscopy: The Evolution of High-Power, Narrow-Spectrum Modules
