50 Watt S68 High Pressure Sodium 120V Ballast Kit No USPS 300 Lumens Lumen Efficacy 125

300 Lumens Lumen Efficacy 125 Lumens Per Watt ANSI Type S51 Bulb Shape T14

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

For nearly a century

500 and Mean Lumens of 8

50 Watt S68 High Pressure Sodium 120V Ballast Kit No USPS 300 Lumens Lumen Efficacy 125HPS 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