Product Description Lamp power: MH400W HID Ballast Input Power: 420W HID Ballast Input Voltage: 230v Current: 1.83A Power Factor: >0.99 Input Voltage Range: 170~265V Current Crest Factor: <1.7 Total harmonic distortion: <10% Ambient temperature range: (-25~50)?C Enclosure temperature rise: <28?C Environment. IP requirement: IP23 Ballast Dimensions: 215x107x80mm (8.46X4.21X3.15") Ballast Weight: 2.6kgs (5.73lbs) Features: -Soft-Start -Soft-Switching PWM -Built-In Diagnostics -Over-Current Protection -Short-Circuit Protection -No-Load Protection -Last-Phase Turn-Off Protection -Overhead and Surface Mountable Our company specializes in producing and exporting HID Electronic Ballast: HPS/MH electronic ballast.