Allows you to dim or overdrive your lamp. Alternatively, start with lower wattage lamps and set the power pack to the matching power setting. The Sunmaster Hobby ballast can power 250W, 400W or 600W HID lamps. Change to higher wattage lamps for flowering. (Recommended: This powers lamps at their optimum for maximum growth light output (PAR) Boost your 600W lamp using Power Boost (660W) at the final flowering stage for even more light output.

Features:

• Four flexible power modes 250W, 400W, 600W & 660W
• Power boost modes for excellent flowering
• Dims lamps
• Soft start technology
• Dynamic frequency control
• Fast lamp re-strike
• Circuit safety protection
• Low operating temperature
• Silent running
• RF shielding