What does UL mean?
UL Rated Christmas Lights
Underwriter Laboratory, a U.S. government agency that controls and monitors lighting rules and safety regulations. UL approved means a product is approved by this agency. UL will help you understand if your Christmas Lights can be used indoor and outdoor, or just indoors. In addition UL has done all the work for you and determined how many sets of Lights you can connect together with no problem. Commercial Grade traditional mini lights allow you to connect up to 6 sets together, while LED allows you to connect over 30 sets together.
Always be sure to know if your lights are UL Listed for Indoor use or Indoor and Outdoor use before using them outside.
