... 50,000 hours 110-220V, 35W, 50W, 70W MH/HPS Electronic Ballast, Suitable For MH & HPS Lamp70W MH ballast, HPS ballastFeatures: ... control hot-start, immediately shutdown if the ballast fails to ignite lamp in 30 minutes, ... protectionSpecification: Power: 35W, 50W, 70W Input frequency: 50/60Hz Input voltage: 110 to 220V Power factor: >0.95 ... connection line Lifespan: 50,000 hours Electronic Ballast