The SP20-RD4 is the latest addition to the Greengate switchpacks family, delivering a wide array of switching solutions in a single unit. This robust switchpack is designed to deliver unmatched performance. The SP20-RD4 features robust and reliable mechanical latching relays, exclusive fail safe circuitry, daylight harvesting, bi-level switching and is configurable for energy code requirements. The switchpack is specifically designed to handle high inrush electronic ballast loads and offer unmatched durability and service.