LumiStep High Performance HID-DynaVision HID-DV LS-10 Xt 140 /S CPO-TW 220-240V CosmoWhite light source independent dimmable, lightweight one-piece electronic ballast. It is a single-lamp, lightweight electronic ballast that can provide 140 W of COSMoWhite light source. The ballast has a power factor of 0.95 and a dimming range of 60%-100%. It also features auto-restart, inrush current protection, overvoltage protection and trigger shutdown time.