... 3) Power factor>0.99 4) 1000W Lighting Accessories --- HPS/ MH 1000 Watt Dimmable Ballast Hold FCC, CE, TUV certification approved Features ... -flickering, noiseless5) Fast start-up, reach full brightness quickly6) Operate HPS & MH lamps.7) Available in 220-240V and 110-120V ... operating temperature, rapid install and excellent energy saving. Lighting Accessories --- HPS/ MH 1000 Watt Dimmable Ballast