50 Watt S68 High Pressure Sodium 120V Ballast Kit No USPS making it ideal for use

making it ideal for use in enclosed luminaires

GE MPR400/VBU/O

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

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

000 Lumens Means Lumens 24

50 Watt S68 High Pressure Sodium 120V Ballast Kit No USPS making it ideal for useHPS 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