led high bay has an excellent performance in cold temperature compared to the HID system. Conventional lighting system produce heat, there is an imbalance with hot lamp s working in cold place. LED performance inherently increases as the temperature drops. This makes LED a nature fit for the cold lighting system. E-lite, using the cutting-edge technology in LED, is very useful in this cold application where replacement and maintenance are laborious and expensive. E-lite new generation LED lamps are originally designed with Cree chips and our own optic lens to minimize glare and deliver uniform light. The purpose of E-lite led high bay is for one-to-one replacement. It is very convenient for replacement and maintenance. This new lighting system consumes less half energy than old HID system in low temperature ambient workplace. One more disadvantage of conventional system is that the high pressure sodium takes long time to warm up.