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T8 High Bays

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T8 fluorescent high bay fixtures are a widely used solution for warehouse and industrial lighting in the 15 to 25-foot ceiling height range. T8 lamps strike a balance between lamp efficacy, ballast availability, and replacement cost that makes them a practical choice for facilities that have already standardized on T8 technology across other areas. These fixtures are available in 2-lamp, 4-lamp, and 6-lamp configurations, with reflector designs that shape the light distribution for different bay widths and aisle layouts.

High bay T8 fixtures mount via hook, aircraft cable, or rigid pendant and are rated for the temperature extremes common in unheated warehouses and manufacturing spaces. Ballasts should be specified for the correct lamp count, voltage, and ballast factor for your application. High ballast factor units increase lumen output at the cost of higher wattage, while low ballast factor versions reduce energy draw with a corresponding reduction in lumens. Always verify ballast-to-lamp compatibility before placing a bulk order.

Browse the complete Linear High Bay Lights category for all linear high bay styles. Compare against T5HO High Bays for higher output per lamp. For a full LED retrofit, our LED High Bay Fixtures deliver strong payback. Replacement lamps are stocked in our T8 Lamps section. Contact RelightDepot for project quotes and ballast spec support.