1500w ballasts for grow lights. These ballasts can operate up to 1500w high-pressure sodium (HPS) or metal halide (MH) grow lamps, depending on their specifications. Digital (electronic) ballasts use circuitry in place of transformers, capacitors, and ignitors that traditional magnetic ballasts have. Magnetic ballasts often run warmer than electronic ballasts, and they require slightly more power (approximately 5% more wattage) to drive the same wattage bulb as an electronic ballast, yet they are often less expensive in terms of upfront cost.

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