TOPHORT 600 Watts Digital Dimmable Electronic Ballast for HPS MH Grow Light Bulb Lamp (600W, Blue) Garden & Outdoor. Suitable for MH and HPS:TOPHORT electronic dimmable ballast compatible with both MH and HPS bulbs, 120V and 240V power supplies. Super-Safety:TOPHORT digital ballasts are tuned for minimal total harmonic distortion (THD%) 99% Power factors replaceable outset fuse by input terminal for short circuit protection short circuit protection by automatic power shut off for ultimate safety fast lamp ignition by lighting up the bulbs within 1-3mins max.Stable Output Voltage:High-frequency output results in less power loss (50/60Hz Frequency). Package Dimension: 3.3 x 14.4 x 7 inchs. We usually respond within 24 hours on weekdays. Any product you return must be in the same condition you received it and in the original packaging. The item "TOPHORT 600 Watts Digital Dimmable Electronic Ballast For HPS MH Grow Light Bulb" is in sale since Thursday, September 24, 2020. This item is in the category "Business & Industrial\Building Materials & Supplies\Lights & Lighting\Lighting Ballasts & Starters". The seller is "powerfam24" and is located in New York, New York. This item can be shipped to United States.