... times of incandescent lamp,5-15times of high pressure electric discharge lamp,and 5-10times ... electrodes filaments,life time>100000 hours 3.Have high luminous efficacy 80lm/w,effective luminous efficacy up ... enevgy,similar to new fluorescent lamps of high energy saving,which creat less heat to reduce ... reach and busy such as tunnels,roads ,high bay areas,Ceiling Lights has a wide operating temperature ...