Answer
Oct 30, 2025 - 04:24 PM
T8 and T12 LED bulbs are not always directly interchangeable because they differ in diameter, a T8 bulb is 1 inch (8/8 inch) thick, while a T12 bulb is 1.5 inches (12/8 inch). However, since both use the same bi-pin base spacing, many T8 LED tubes can fit into T12 fixtures. Compatibility ultimately depends on your ballast type or whether the LED tube is ballast-bypass, so always review the manufacturer’s instructions before installation to ensure safe and efficient operation.
