230v/600w electronic ballast Reduces power losses and energy saving. Constant output power. Various protection function, high safe and reliable. Green, it reduces the pollution to the power net. Easy to install and convenient for use. The electronic ballasts for hps can compensate for voltage loss, which means that all hps lamps in one greenhouse produce the same amount of growth lighting. The electronic ballast can protect the hps lamps against power surges to improve lifetime. No sound resonance. Conformity with tuv, ce and rohs certification. Good guarantee for our customers. Description: Input voltage: 220-240v Frequency: 50-60hz Power loss: 0.99 Thd: