The demand for LED luminaires is growing exponentially. For example, a major Midwest city recently ordered several hundred thousand LED luminaires to replace street lights. Lower operating costs of LED luminaires is driving both commercial and consumer demand. Other attributes of LED luminaires include better and more uniform illumination and the ability to tailor the color of the LED’s to the correct mixture for the individual applications. All of these are major advantages over the use of sodium vapor lamps or traditional incandescent bulbs.