The LED light tube is a modern light source used mainly in G13-based fluorescent light fixtures to replace T8 fluorescent tubes. The main advantages of an LED light tube over a fluorescent tube are energy efficiency and longevity. An LED is also referred to as an LED fluorescent tube, but because the light from an LED fluorescent tube comes from LED components and, like a fluorescent tube, does not contain fluorescent material, an LED fluorescent tube is a more appropriate name for a product.

LED light tubes are usually implemented with a large number of low or medium power LEDs. They make the light output and heat conduction uniform throughout the length of the pipe. The operating temperature of LED light tubes is lower than with traditional lighting technologies, and the LED light tube produces less heat than traditional fluorescent tubes.