For newest rotating end cap t8 led tube manufacturers, it is best to reserve some relevant knowledge before buying the tube. This will only benefit the purchase of the tube, but there is no harm. Lamp tubes are generally represented by numbers such as t4 and t5. "t" indicates the tube shape of the tube, and the number behind it indicates the diameter of the tube. For example, "t8" means that there are 8 "t"s.