Hydro Crunch 400-Watt Dimmable Digital Ballast features high power factor， high luminous efficiency， adjustable wattage output， and convertibility between HPS and MH light bulbs for vegetative growth to flowering stages. Run your hydroponic grow lights brighter with this ballast as it supports dual voltage 120-Volt/240-Volt. The high operating frequency not only ensures continuous power delivery， but also has conserving bulb life in mind. As efficient and powerful as it is， its silent operation and light weight design adds to the maximum lumen any plant will ever need.

Automatically converts between High Pressure Sodium (HPS) and Metal Halide (MH) lamps supports dual voltage 120-Volt/240-Volt

Built-in cooling fan to run cooler than other digital ballasts

Easy adjustable power setting of 50%， 75%， 100%， and super Lm (110%) internal rf protection allows 50 Hz to 60 Hz

Power supply: 120 to 240-Volt

Frequency: 50/60Hz

Power factor: 99.9%

Power cord: 120-Volt 8 ft. long

Matched bulb types: HPS / MH

UL Listed

2-years warranty