... : ≥30KHz, ≥20KHz(1000W)Input frequency: 50/60HzPower factor: >0.99THD:<10% CF: <1.715% cooler than most electronic ballast availableUsage temperature: -40 ... , 110%, 100%, 75%, 50%(optional)Prolong lamp life at least 10%Energy-saving up to 30% compared with magnetic ballastComprehensive protection ...