Spec.: Runs on 120 - 240V, 50/60Hz, 8ft 120V power cord
Watt option: 150w / 250w / 400w / Super lumens (110%)
Long service life: Soft start program & Slow light start-up program
Note: The dimmable setting of ballast should be the same watts as the bulb when starting, or your bulb may not be lit up. The extra setting is to adjust the brightness (lumen) of the bulb. Different lumens have different effect on the plants
What You Get: VIVOSUN 400w digital ballast, 8ft 120 volt power cord