There are two commonly used xenon lamp aging testers, one is the air-cooled xenon lamp aging test chamber, its structure is to irradiate from the top to the bottom, and the sample is placed on the slope below, and the other is the drum type structure, the xenon lamp tube is located In the middle of the drum, the sample is placed on the drum wheel. Atlas xenon lamp aging test chamber Comparison of test data of water-cooled xenon lamp aging tester with natural aging data: https://www.standard-groups.com/en/News/666.html#m