Try it in an outdoor environment with plenty of sunlight, and it is susceptible to flickering in the room due to the frequency of the lamp.
The common fluorescent tube is a kind of gas lamp. There is a low-pressure argon or argon-helium mixed gas and mercury vapor in the tube. The light and color temperature of the tube will change with the frequency of the alternating current, which will cause flicker. However, because the frequency of flicker is very high, it is difficult for the naked eye to recognize, and it will be perceived that the lamp emits continuous light. But for electronic instruments, the flashing frequency of fluorescent lamps is not high. Therefore, the ripple phenomenon of the mobile phone and the camera is caused by the frequency of the light source, the shutter, and the photosensitive element.