UL sucks too. Their Recognized Component certificates are essentially useless. All they tell you is a certification exists, but without any information about the rated working conditions, which are critical to safety. A vendor can say its power supply works up to 1000 volts, and claims the power supply is also UL certified (without telling you it's certified only for 100 volts, the 1000 volts spec is only a functional rating and cannot be used for safety-critical applications).

The real information is in UL's Conditions of Acceptability, and it's often nowhere to be found. You can either try asking the vendor nicely and hope they don't ignore your request. Or pay (possibly thousands of dollars?) to purchase that information from UL. https://www.ledsmagazine.com/company-newsfeed/article/16690659/ul-conditions-of-acceptability-now-available #electronics