4-Ft

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4-foot T12 fluorescent tubes are the most common T12 size, widely used in shop lights, garage fixtures, and commercial spaces running on magnetic ballasts. Standard designations include F40T12 (40-watt) and F34T12 (34-watt energy-saving version), both using a Medium Bi-Pin base.

These 48-inch lamps are available in a range of color temperatures from warm white to daylight, making them suitable for workshops, utility areas, and retail backrooms. If your fixture uses a magnetic ballast and accepts 1.5-inch diameter tubes, the 4-foot T12 is the correct replacement.

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