An LED Module Array System Designed for Streetlight Use

IEEE abstract currently, most outdoor illumination sources use high intensity discharge (HID) lamps as light sources. Global concerns have been raised regarding the amount of power consumed by HID lamps, and by extension, the amount of atmospheric CO₂ released due to such power consumption. Because of this, light emitting diod (LED) array illumination has received attention recently as an energy-reducing light source. Because the illumination produced by an LED is relatively weak, LED light fixtures differ in several ways from traditional light sources, and it is necessary to incorporate numerous LEDs into a module array in order to use them for road illumination. Concerns exist that the failure rate of LED module arrays will increase with the use of large number of LEDs. In this paper, we calculate changes to array reliability over set periods of time, and propose a module array design composition that was found to offer high-reliability.