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SP6500, as one of the huge single bar LED grow lights, installed with top quality Samsung LM301B diodes, designed with enhanced red in broad-spectrum light, emits the highest central PPF and has the superb penetration that its major applications are for high-wire plants and greenhouses. Wattage - 650w Veg Coverage - 4x5 ft Flower Coverage - 3x5 ft Featuring a thick aluminum passive heat sink and densely arranged chips, the SP Series provides high efficacy but low heat output while minimizing obstruction to natural light