Underwriters Laboratories®is an independent product safety certification company that has been active in product testing and safety standards development for over a century. UL evaluates over 19,000 types of products, components, materials and systems annually. Every year, 20 billion UL test marks are awarded to products from 66,000 manufacturers. UL’s global group of companies and network of service providers includes 68 laboratories, testing and certification facilities serving customers in 102 countries.