The Lumatek 400W electronic ballast, model LK 4240, is designed for hydroponic systems in garden and patio settings. Operating at a voltage range of 220-240V, this purple ballast provides intelligent circuit protection to ensure safe use with grow light systems. With a wattage output of 400W, this electronic ballast is a reliable choice for optimizing grow lighting and accessories in indoor gardening setups. Used but in good working order See pictures
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