Electronic and electromechanical ballasts for neon fluorescent discharge lamps, or sodium vapor and metal halide. Multi-power electronic ballasts for classic 36/58w tubes or for slim 21w/28w/39w/54w fluorescent tubes. The choice of electronic ballast is always preferable to electromechanical ballast, as it guarantees longer lamp life and less flicker, as well as higher consumption efficiency. The only downside to electronic ballasts concerns the ignition phase, in fact the electronic regulators have a very low ignition time and this leads to all the transformers turning on at the same time. In systems with undersized protection switches, the magnetic-thermal protection device could trip. Market leading brands are Tridonic and Osram.