The Robertson RSN1GPH20120 Electronic Rapid Start UV Ballast is a high-efficiency UV lamp ballast designed for instant start lamp operation. Engineered for ultraviolet (UV) and germicidal lighting applications, it delivers an accurate nominal lamp current of 425mA, supports an arc voltage range of 24V-47V, and operates on an input voltage of 120Vac (50-60Hz) This premium rapid start electronic ballast powers 1 ea. 10W-20W SO UV lamp (GPH212T5 – G20T10) Key Features: ✔ Voltage: 120Vac ✔ Rapid Start Technology: Ensures fast lamp ignition and energy savings ✔ 425mA Nominal Lamp Current: Delivers consistent and efficient UV output ✔ High-Performance Compatibility: Supports UV germicidal lamps used in high availability water purification, air disinfection, TOC reduction and industrial sterilization applications ✔ Certified for Safety & Performance: cULus for safe and reliable operation ✔Packaging: Each carton contains ten ballasts for better sku management