... white light can penetrate fog 3.Inner ignitor HPS 1.High luminous efficiency,less power consumption.2. CE, ISO, ROHS ... hours6.Application:Road,airport,wharf,station,industrial and mining enterprise lighting,etc7.Inner-ignitor High pressure sodium lamps don't need to use ... external idnitor.They can replace high pressure mercury lamps.8.We offer Quantity Discount, please contact us ...