1st with DLC Horticulture. 1st with UL Performance. High light output, PPF up to 1,358 µmol/s. High efficiency up to 2.3 µmol/J. 4 spectrum distributions to chose from. Listed for use in wet locations to UL standards and IP66 rated. Designed in the U.S.A. by Horticulture Lighting Engineers. Specifically designed to optimize LED performance for Horticulture applications.