Lumatek LK6240D digital electronic ballast designed for 600W M.H. and H.P.S. lamps. This 240V only unit features a dimmable design with settings for 300W, 400W, 600W, and Super Lumens. The purple finned aluminum housing provides passive cooling during operation. Dual control knobs and power switches allow for precise adjustments. Please note this unit shows significant signs of wear, including oxidation on the exterior hardware and some casing damage.