Changzhou Shuangjian Electric Equipment Co., Ltd. is located at Changzhou City of the Yangtze River Delta known as a land flowing with milk and honey in Jiangnan. The Taihu Lake is to its south and the Yangtze River is to its north. The distance from here to Shanghai or Nanjing is near equal. Suzhou, Wuxi and Changzhou consist of economy developed region well known as "Su-Xi-Chang". Changzhou is one of important central cities at Golden Delta region of lower reaches of the Yangtze River.

The no pole lamp means no filament and no electrode. It will ignite in the mode of electromagnetic induce. It features high effect, energy saving, long life, environmental protection. It is the 4th generation of light source and integrates all advantage of light source in its one body such as energy saving, money saving, save worry, save labor, not necessary to maintain when light al the year round. Its working frequency is 2.68MHz that is more fifty thousand times than power frequency lighting. It eliminates drastically"stroboscopic effect"existed in power frequency lighting. And is green environmental protection. Its color rendering index is more than80 and nearby daylight. The vision is nature. The product has passed the test and authentication of state authority department and won the authentication of KETI, Korea.