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: Independent red and blue On/Off switches 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" working area Passive cooling, completely silent and reliable Energy saving LEDs compared to traditional light sources Each fixture has 4 holes on top-end plate for suitable hanging of wires or chains to accommodate suspension above growing plants Water resistant 3 year limited warrantyThe ZELION HL 3x2, 2x2, and 2x1 family of horticulture grow light fixtures uses state-of-the-art OSRAM OSLON® LEDs and optics. This combination delivers the most reliable LED horticulture fixtures in the industry. The unique spectral content, which targets the essential absorption peaks of chlorophyll-alpha and chlorophyll-beta, is sure to help you maximize your yields and cut operating expenses with optimum micromoles per energy unit.