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T8 Ballasts

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T8 fluorescent ballasts power T8 lamps, the 1-inch diameter fluorescent tubes that became the dominant commercial fluorescent standard following the phase-out of the older T12 format. T8 lamps and their dedicated ballasts are found in millions of installed commercial fixtures across offices, schools, hospitals, retail stores, warehouses, and government buildings, and will continue to require ballast replacements for ongoing maintenance until those facilities complete an LED retrofit.

Electronic T8 ballasts operate at frequencies above 20,000 Hz, eliminating the visible flicker associated with older magnetic ballasts and improving both lamp efficiency and occupant comfort. They are available in instant-start, rapid-start, and programmed-start configurations. Programmed-start ballasts are the preferred choice for spaces with occupancy sensors, as the soft-start sequence significantly extends lamp life in applications with frequent on/off cycling. Dimming T8 ballasts compatible with 0-10V control systems allow integration into daylight harvesting and automated lighting control schemes.

RelightDepot carries T8 ballasts in standard and dimming versions, including 1-lamp, 2-lamp, 3-lamp, and 4-lamp configurations from commercial manufacturers. For other fluorescent ballast sizes, browse T5 and T5HO Ballasts and T12 Ballasts. T8 replacement lamps are available in the T8 Lamps section. The complete Fluorescent Ballasts category covers all tube sizes and emergency ballast options.