1. High effective energy saving 2. High luminous effciency 3. Long lifetime, low maintenance cost 4. OEM welcome We have some advantages of this high pressure sodium lamp: Excellent uniformity of color temperatureWith lower purchase costs and maintenance costsHigh effective energy savingLong lifetime, reliable performance, low maintenance costHigh Luminous effciency Watt: 70w / 110w / 150w / 250w ...