Zhongshan ALLTOP Lighting CO., LTD strictly selects the raw materials of led lighting systems for home-200w led high bay. We constantly check and screen all incoming raw materials by implementing an Incoming Quality Control - IQC. We take varies measurements to check against collected data. Once failed, we will send the defective or substandard raw materials back to suppliers.. We receive important feedback on how our existing customers' experience ALLTOP brand by conducting customer surveys through regular evaluation. The survey aims to give us information on how customers value the performance of our brand. The survey is distributed biannually, and the result is compared with earlier results to identify positive or negative trends of the brand.. Our dedicated and knowledgeable staff have extensive experience and expertise. To meet the quality standards and provide high quality services at ALLTOP Lighting, our employees participate in international cooperation, internal refresher courses, and a wide variety of external courses in the areas of technology and communication skills..