Tronic Magnetic Ballast 40W for Fluorescent Lights

Our review

This Tronic magnetic ballast is a 40-watt choke for fluorescent lighting, built around a coil of copper wire. As current flows through the coil, the magnetic field it creates holds back most of the electricity, so only the right amount reaches the tube. That makes it a fit for anyone maintaining or repairing a fluorescent fixture that uses a 40W tube, rather than for LED conversions. Before buying, check your existing ballast's wattage and the tube it serves, since a mismatch can cause flicker or early failure. Magnetic chokes like this are simple and robust, but they are heavier and can hum compared with electronic ballasts, so weigh that against your setup. Available on Sokonia.