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Sunmaster 1000W conversion Metal Halide (MH HPS Lamp) Grodan If the conductivity reading is healthier development from seed If the conductivity reading is too high Shake bottle well before use Dual Stage Flexibility: Allows indoor gardeners to use a Metal Halide spectrum during a plant's early growth phase and later switch back to an HPS bulb for flowering blue spectrum light (6500°K) that mimics natural daylight to promote strong
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