BAL1400 Fluorescent Emergency Ballast 1400 Lumens - BRAND NEW Replacement for National Battery PL7SC8 emergency ballast pack works with or without an AC ballast to convert new or existing fluorescent fixtures into emergency lighting compatible with most one-, two-, three-, and four-lamp electronic, standard and dimming AC ballasts. National Battery PL7SC8 replacement emergency ballast pack meets or exceeds all National Electrical Code and Life Safety Code emergency lighting requirements. Life Expectancy of 7-10 Years