... lighting,discharge lamp, it is an kind of energy saving lamps, mostly use for street lights, tunnel lights, high ... 100 times of incandescent lamp,5-15times of high pressure electric discharge lamp,and 5-10times of ... 70% enevgy,similar to new fluorescent lamps of high energy saving,which creat less heat to reduce ... to reach and busy such as tunnels,roads ,high bay areas,it has a wide operating temperature ...