Apollo Horticulture Purple Reign 1000W Watt Digital Dimmable HPS MH Grow Light Ballast for Plant Growing Package Includes: 1  Apollo Horticulture 1000 Watt Digital Dimmable Ballast BALLAST SPECIFICATIONS: 14.75 x 6.25 x 3.5 / 1.5 Digital Display / Weight: 9 lbs. / Voltage: 120V -240V / Hertz (50hz / 60hz Frequency) / 9.7 amps / Hydroponic S-Type Plug Output INTERNAL TECHNOLOGY: Includes embedded circuit technology to minimize power interruptions along with short circuit protection by automatically shutting off the power for ultimate safety. Our ballast also includes a step-less adjustable knob that displays your operating wattage on a digital screen. Our ballast is ONLY compatible with 1000 Watt HPS and MH bulbs and allows for 12-Dimmable Options: 1050W/1000W/900W/840W/800W/750W/700W/630W/500W/420W/400W RELIABILITY YOU CAN TRUST: Silent yet powerful operation features built-in dynamic detection to prevent overload, voltage fluctuation, and lamp EOL. ELECTRICAL HAZARD WARNING  DO NOT get wet or place near water. Fast lamp ignition lights up the bulbs within 5 seconds and provides flicker-free stabilization with constant lamp voltage. TOP CUSTOMER CARE: Your Apollo Horticulture Purple Reign 1000W Watt Digital Dimmable HPS MH Grow Light Ballast for Plant Growing is backed by our exceptional customer service team and comes standard with our 90-Day Money Back Guarantee.