more info you can visit: br SUNPROU OPTO-TECHNOLOGY CO., LIMITED is a governing units of China Illuminating Engineering&Agriculture Society,and is a professional LED agricultural lighting company including the field of researching , manufacturing and marketing. Company passed the ISO 9001:2000 certification in 2011 , became the most professional high-tech LED agricultural lighting enterprise and produced the most competitive products, as well as the largest exporter of LED plant light production and supply enterprise.