22185217 36 W Electronic Fluorescent Lighting Ballast, 220 → 240 V. The Tridonic PC T8 PRO electronic fixed output ballasts for fluorescent lamps are ideal for emergency lighting systems. Providing constant light when there are fluctuations in the mains power supply and efficiently shut down when a lamp becomes defected or exhausted. These lighting ballasts have a nominal lifetime of up to 100000 hours and have the highest possible energy class with intelligent voltage protection.