Single Wavelength Light

The common light you see in daily life is not single wavelength light. For example, the sun light, there are basically 7 colors in the sun light, therefore there are lots of wavelength light in the sun light. Many white light is composed by different single wavelength lights. Even the single color light is not single wavelength. The red LED light Bulb, the blue LED tubes, ... they're single colors, but not single wavelength. The blue LED tubes may contains lights with the wavelength from 400nm - 500nm.

We have the single wavelength light generator here :

532nm single wavelength light generator:

445nm single wavelength light emitter:

473nm single wavelength light system:

In fact there are lots of other single wavelength light system, from 405nm - 2000nm.