For reliable operation of Twin 58 Watt TLD and PLL Fluorescent lamps this long lasting Basic II High Frequency Ballast from Philips is a good solution. Featuring instant flicker free start an impressive 50000 hour service life automatic restart after lamp replacement and active power factor correction it is a proven choice for applications with low switching frequency and long operating hours such as offices corridors and industrial premises. This slim ballast has a robust design offers simplified wiring compared to an electromagnetic ballast and saves 35% in energy consumption.