ELT BE 3/4x14w ballast to run 3 or 4 x 14w, T5 lamps. This ballast has a normal average life of 50,000 hours. Dimensions: W40 x H28 x L230mm This class 1 ballast has preheated starting function for longer lamp life and also comes with an automated cut off function if lamp failure occurs. Connector cross section is 0.5 - 1.5 mm2.