Patent invented integrating sphere for luminous flux and spectral distribution measurement special of T5/T8 LED tube. LED tube is burn-in on a test pole. While doing test, the test pole is directly pushed into the sphere from a special port of the sphere without operation of opening sphere. The uninterruptible power measurement could be achieved for batching testing. It increases more than 5 times efficiency for tube lamp measurement. The interfaces for typical sphere are reserved.