In indoor applications with occasional on/off switching activity the Philips High Frequency Selectalume II Strain Relief ballast offers a very reliable and affordable solution. A very robust gear it benefits from simplified wiring compared to a conventional ballast automatic restart after lamp replacement and a connector offering the flexibility for horizontal-manual or push-in robot wiring. It is ideal for applications with long operating hours such as offices retail stores corridors and supermarkets. This gear also boasts a service life of 30000 hours at Ta 50