The harm of hollow inside the solar LED road stud is also shown in the LED lampshade. LED lampshade will be damaged because it is hollow, and then LED itself will be damaged. How to detect this? We have made an impact instrument for solar LED road stud lampshade, and the detection method is as follows: after the white board is drawn out, the steel ball falls freely at a height of one meter, and vertically impacts the LED lampshade of solar LED road stud to see if the lampshade is broken.