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Features: - Fit for HPS & MH Light - fully compatible for metal halide and high-pressure sodium bulbs - Dimming Options & Super Lumen - runs at 150W/250W/400W - Safe Protection - overheating protection & open/short circuit protection for critical components - 15% Cooler Operation - with built-in fuse, cooling fan and graduating fin design - No Flickering - runs efficiently on generators without flickering - High Efficiency - reduces wastage and improves efficiency with higher lumen output than magnetic ballasts Specifications: - Overall Dimension(LxWxH): 9 13/16" x 4 5/16" x 2 3/4" (25 x 11 x 7 cm) - Cooling Fan: Yes - Power: 400 W - Power Factor: ≥99% - Dimming Options & Super Lumen: runs at 150W/250W/400W - Total Harmonic Distortion(THD): ≤10% - Operation Temperature: -4 to 104°F (-20 to +40°C) - Crest Factor: ≤1.7 - Specified Frequency: 50/60 Hz - Voltage: 110 V to 240 V - Material: Aluminum - Net Weight: 5.1 lbs (2.31 kg) Package Contents: - 1x Electronic Dimmable Ballast - 1x Power Cord