How to quickly test the luminous angle? In a laboratory environment, you can use an angular distribution tester. In a normal environment, you can use a simple method, which is to use the fluorescent reaction characteristics of white paper to ultraviolet light, and the paper surface is perpendicular to the light surface of the lamp bead and centered. Aligned. The angle of the blue-white area visible to the naked eye is the light-emitting angle. As shown in the following schematic diagram, it is easy to see that the luminous angle of the GMKJ LED hemispherical lens lamp bead is about 60 degrees.
