... %-50% Seving more energy 600W Dimmable electronic digital ballast HID HPS Digital Electronic Ballast for 600W HPS and MH Lamp Voltage input ... : Available Weight: 2.6kg/5.73lb Max. Lamp distance from ballast: 15m/49ft Operating temperature range: -30 º C~+50 º C Dimension ... , 75% 300W , 400W and 400W with Super Lumen.The 600W ballast can be adjusted to 50% 300W, 75% 450W, 600W and ...