... Energy saving up to 20% Lifespan: 50,000 hours 110-220V, 35W, 50W, 70W MH/HPS Electronic Ballast, Suitable For MH & HPS ... , excellent ground protectionSpecification: Power: 35W, 50W, 70W Input frequency: 50/60Hz Input voltage: 110 to 220V Power factor: >0.95 Frequency range ...