50 Watt S68 High Pressure Sodium 120V Ballast Kit No USPS Keystone Ballast core and coil

Keystone Ballast core and coil models are ideal for a wide variety of lighting applications

Advance Ballast 71A7971-001D

For nearly a century

this probe start GE R175 Multi Vapor Metal Halide HID light bulb has an ED28 design

making it ideal for use in enclosed luminaires

50 Watt S68 High Pressure Sodium 120V Ballast Kit No USPS Keystone Ballast core and coilHPS Ballast Cross Reference: Advance Ballast 71A7807 Sylvania Ballast LU50 120R Keystone HPS 50R 1 KIT MagneTek 1233 35U Venture V90B1120 High Intensity Discharge (HID) lamps require a ballast to apply starting voltage to the lamp and establish current flow an arc between the lamp electrodes. Without a ballast, the arc will extinguish or draw increasing current until some circuit element burns up. Ballasts provide system stability by limiting the