White light creation using leds
There are currently several methods employing leds that are commonly used to generate white light.One method of makinf white light with leds by mixing monochromatic leds.A second method is coating certain types of leds with phosphor.
White light creation by mixing colors
Red,green,and blue,and occasionally amber,light from monochromatic leds is mixed to generate white led.The result is refferred to as an RGB-generated white light.
White light creation using phosphor
A phosphor-coated led or a blue or near-ultraviolet led is also used to produce white led.Beacuse they are based on a blue or near-ultraviolet led,they usually have very high color temperatures,which results in a cool or blue apperance.By adding phosphors that that emit in the red area of the visible spectrum,it becomes possible to obtain a warmer white color,although the luminous efficacy of the led is reduced by approximately 50 percent.
