Lumatek digital ballasts are the most advanced lighting solution for modern horticulture. Small, compact, and completely silent these E-Ballasts are able to deliver more lumens while using less electricity than standard magnetic ballasts. Unlike traditional ‘core and coil’ magnetic ballasts, Lumateks are microprocessor-controlled and able to evaluate and compensate for the actual state of lamp degradation and voltage fluctuations in power supply from your local grid. This means that Lumateks are able to provide a precise controlled output voltage to the lamp ensuring optimum PAR levels are achieved. Key Specifications/Special Features: Dimmable Ballast Electronic ballast for 600W HPS or MH lamp Voltage: 240V 50/60Hz Current: 2.75A Input power: 635W Output power: 600W Power factor: >0.99 Voltage range: 180 to 265V THD: <8% Lamp CCF: <1.7 Operating frequency: high frequency No audible noise, no flicker Env Temp: -25 to 50°C (-13 to 122°F) Enclosure temperature rise (?t): 35°C (95°F) Env IP require: >IP23 Optional selectable dimming levels at 400W and 600W levels. Boost your output 10% by switching to 600SL.