Welcome to brain Stuff from house stuff works dot com, where smart happens Him Marshall Brain with today's question, what do the UL marks on so many products mean? U L stands for Underwriter's Laboratories, an organization that has been around for more than a hundred years. If you visit the u L site at UL dot com, you can find the following description. U L is a world leader
in product safety testing and certification. For more than one hundred years, manufacturers have had their merchandise evaluated and tested for safety risks by our independent third party safety certification organization. Last year alone, approximately fourteen billion products with the u L mark entered the global marketplace. A good summer used by u L is a not for profit organization dedicated
to public safety. You all set standards for different auduct categories and test products to make sure they meet the standards. U L may also certify the installation of products in the field. Underwriters, by the way, are insured. Do you have any ideas or suggestions for this podcast? If so, please send me an email at podcast at how stuff works dot com. For more on this and thousands of other topics, go to how stuff works dot com.