LED knowledge: Difference of LED high bay light and LED low bay light
LED low bay lighting fixtures should be used in areas where the bottom of the luminaire is less than 20 feet above the floor. LED low bay light fixtures are usually 22 - 28" in diameter in order to spread the light evenly. Their widespread distribution improves vertical illumination and permits spacings as much as two or more times their mounting height. In addition, they can be mounted up to 25' when high vertical illuminance is required. Fluorescent fixtures are also good for low bay lighting due to their excellent uniformity and relatively low lumen package compared to HID.
LED high bay lighting fixtures should be used in areas where the bottom of the light fixture is more than 20 feet above the floor. Typical high bay fixtures have a 15 - 18" open reflector allowing for a more concentrated beam spread with a prominent downward component. High wattage LEDs are usually required in order to properly illuminate the space.