Ensuring smooth and energy efficient operation of Single 36 watt T8 (25mm diameter0 Linear Fluorescent Tubes this ELT Basic High Frequency Ballast is a low cost solution for use in corridors offices stations supermarkets and similar applications. Providing instant warm start silent and flicker free illumination and automatic end of life cut out it also guarantees constant light output over the life of the lamp. This single ballast is non-dimmable and works on universal voltage systems between 110 and 260 Volts.