Tridonic Atco 89800004 ballast for fluorescent lamp. With PC PRO, can get the maximum from a fluorescent lamp. x II processor technology ensures an intelligent balance of tolerances for extremely precise lamp operation. As a result of this careful treatment, the lamps feature a long service life, even after more than 50,000 starts. In this regard it is no problem if ambient temperatures fluctuate between -25 and up to 80°C according to the specific version. With overvoltage caused by erroneous wiring, the supplementary Intelligent Voltage Guard protective function outputs a warning.