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

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

SYLVANIA remains at the forefront of energy-efficient H

For nearly a century

Advance Ballast 71A7971-001D

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