Whether you are a commercial grower or a do-it-yourself horticulturalist, the modularized ZELION HL family is suitable for your application. Efficient and dependable LED light fixture for the horticulture industry Features: OSLON LED L70 life rating of > 100,000 hours State-of-the-art optical design and materials for optimum PAR (Photosynthetically Active Radiation) 24" x 12" to 36" x 24" working areas Passive cooling, completely silent and reliable Energy saving LEDs compared to traditional light sources Water resistant, independent red and blue On/Off switches 3 year limited warranty