LED, short for Light Emitting Diode, has become a common household name. Traffic lights, alarm clocks, and now even big screen megatrons are constructed of LEDs. Since LEDs are fairly bright and are extremely energy efficient, white LEDs could provide bright light at a low cost. This is a reason why white LEDs are an interesting specimen: they could be used for lighting. How do we construct a white LED? On one hand, LEDs only emit certain parts of the spectrum depending on the color of the LED, but on the other hand, white light consists of emission from the entire spectrum. Contradiction? Let us examine the premises.