The 300-450-600-660 watt Switchable Electronic Ballast features a three year warranty and has hot lamp restart protection and a 8 min delay. 

Features:

3-YEAR WARRANTY
• Extruded aluminum housing is engineered to dissipate heat and keep the components cool without noisy fans
• 120V/240V - Detachable power cord allows easy change over
• Operates both HPS & MH lamps
• Completely silent and lightweight
• Extremely efficient – 99% power factor
• Complies with UL, CUL, EMC, ROSH standards
• Generator ready
• Dimmable - Ballast can be dimmed without switching bulbs
• Multi-Wattage - Power different wattage lamps on the same ballast
• Enhanced Lamp Compatibility - works with all major brands of lamps
• Runs between -10° C and 40° C
• Internal RF Shielding