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The Sun System® 1 advanced 105 kHz microprocessor is designed specifically to drive DE lamps at a sustained peak performance. The new Sun System® 1 DE series provides premium components and superior construction for the professional grower. Thermally optimized non-air cooled aluminum housing does not require a cooling fan. Internal ballast programming will protect unit in instance of open circuit, short circuit, over/under voltage or high temperature exposure. Features internal built-in circuit breaker. This Sun System® 1 ballast has dimmable/selectable wattage, turbo and built-in green LED lights for easily identified self-diagnostic performance codes. Low current, staggered ignition delay feature eliminates circuit inrush overload and protects lamp for increased lumen maintenance. Dual universal lamp cord receptacle is compatible with all Sun System® brand reflectors as well as other branded reflectors. Smart Volt® brand technology allows ballast operation 120 – 240 V. Includes a 6 foot 120 volt power cord. Purchase a 240 volt power cord separately (#903088). Compliant with both FCC Article 18 Part A (governs commercial use) and FCC Article 18 Part B (governs residential use) as tested by an independent US testing lab in a true as used configuration.