Constant Optoelectronics Co., Ltd is a high-tech company which is mainly engaged in scientific research, production, technical support and service of LED semiconductor illumination. With our competency in LED lighting technology, we are professional in developing and manufacturing of mid-range and high-end core product lines such as LED-based energy tubular lights, strip lights , spot lights, down lights, street lights, ceiling lights , track lights and wall washers etc. Europe, USA, Middle East, and South-east *****