This replacement sodium 1000W/Wet 26 MFD/525 VAC MIN capacitor is suitable for all Hydrofarm 1000W high pressure sodium and convertible magnetic ballasts.Capacitors store the power in the event of an increased demand on energy. High-powered drives may experience a need for a capacitor to handle the power they run, which often exceeds that available from the power source. Hydrofarm capacitors and replacement capacitors are available in a variety of wattages, brands, and types. Choosing a capacitor to best fit your system can be a confusing process. Contact your Hydrofarm sales representative with questions or for assistance shopping for capacitors and replacements, or to ask what best suits your current ballast and grow room setup.