... lighting system was installed in 1998, replacing high-pressure sodium (HPS) lights. More than 10 years later, all but three of ... an average rated life of 100,000 hours, including the ballast. Some other manufacturers only rate their ballasts for 60,000 ... lighting, grow lighting, etc.Advantage of our product-- induction lamp:(Ballast of induction lamp with UL,CE,FCC,EMC certificate)(1 ...