Conversion High Pressure Sodium (HPS) Lamps operates on Metal Halide ballasts. High Pressure Sodium Conversion lamps have in internal ignitor that allows them to run on Metal Halide ballasts Conversion bulbs are most commonly used to convert a MH light to HPS. This is an inexpensive alternative to buying another complete light system to obtain the benefits of a HPS system. 940w High Pressure Sodium MH-HPS Availability: Usually ships in 2-3 business days. Grow Light High Pressure Sodium Conversion Bulb 940w HP150

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