Dependable with a 15 year service life and encapsulated with thermoplastic resin this Heavy Duty HID Ballast from Philips is a robust and functional solution for use with an external semi-parallel ignitor to run 70 Watt CDM CDO MH HPI (Plus) and SON lamps. This outdoor gear is well suited to road and tunnel lighting applications as it offers exceptional resistance to chemical impact humid conditions and environmental stress crack. It can also be remotely installed and boasts minimal watt losses due to orthocyclic winding.