Description Electronic Ballast with fan : Operates both Metal Halide and High Pressure Sodium Bulbs, Runs 250w, 400w, 600w bulbs at standard operation, Runs 15% cooler than other digital ballasts on the market, Power Effeciency of 99.9%, Higher lumen output than magnetic ballasts, 600w with Fan. What’s the Difference between an Electronic Ballast and a Magnetic Ballast??Find Out Here?