Hydrofarm has more UL and CSA rated products than any other company in the industry.
ETL is a mark provided by Intertek and ETL Semko. Intertek (www.intertek-etlsemko.com) is a global leader in testing inspection and certification services. They are a Nationally Recognized Testing Laboratory and tests products to UL, CSA and CE standards.
A product bearing the ETL Listed Mark is determined to have met the requirements of prescribed product safety standards. Moreover, the mark indicates that the manufacturer's production site conforms to a range of compliance measures and is subject to periodic follow-up inspections to verify continued conformance.
An ETL Listed mark with both "us" and "c" identifiers signifies that the product bearing the mark complies with both UL and CSA product safety standards. If it bears just the "us" identifier, it has been tested and deemed compliant to UL. product safety standards only. An ETL Listed mark with a "c" identifier means the product bearing it complies with CSA product safety standards only.