The Legacy® ballast is extremely efficient at 99.9%. Comes pre-wired with a dual universal lamp cord receptacle that is compatible with all Sun System® brand reflectors as well as other branded reflectors. Includes a 6 foot 120 volt power cord. Purchase a 240 volt power cord separately (#903082). The Legacy® ballast runs on 120-240 volt power. This ballasts has an extruded aluminum housing that is very lightweight. It features soft starting and fan cooling. This state-of-the-art ballast is manufactured to provide today’s serious grower with maximum flexibility & performance.