Featuring a 15 year service life and a proven track record of outstanding operation this encapsulated High Power BSN HID Ballast from Philips is a robust solution for running SON (T) (Plus) HPL HPI and MH lamps rated at 1000 Watts and above. Designed for outdoor use it is often found in sports and area lighting applications as it offers excellent resistance to chemical impact humid conditions and environmental stress crack. It is ideal for pole mounting and boasts minimal watt losses due to orthocyclic winding.