UL Listed #E473120. These direct replacement ballast compatible LED tubes are designed to operate on existing instant ballast, rapid ballast and program ballast with input voltage of AC 120-277V . This LED tube minimizes labor and recycling costs as well as reduce energy consumption. They work well with or without a ballast and offer stable lumens output for different ballast brands and factors. Frosted lenses and installation instruction sheets are available upon request. LM80 test data and certification information available upon request. ***Green Lighting LED is certified to provide a safety label for any fixture installed with LED tubes to maintain its safety listing with UL or ETL.***