To be clear, it's not just a matter of power, but it really is the voltage: shorter wavelength LEDs use semiconductor materials with bigger bandgaps https://en.wikipedia.org/wiki/Light-emitting_diode_physics#M...
To be clear, it's not just a matter of power, but it really is the voltage: shorter wavelength LEDs use semiconductor materials with bigger bandgaps https://en.wikipedia.org/wiki/Light-emitting_diode_physics#M...