There is a green light on the ceiling after turning off the lights.

Afterglow of phosphor in lamp tube. If the energy-saving lamp is cold white light and the content of green powder is relatively high, the phosphor is originally tricolor powder. Fluorescent powder will emit light after being excited by mercury vapor, and some phosphors will store light energy after being excited, especially green powder, so when the lights are turned off, the lamp tube will have green light, which is the afterglow of the fluorescent powder in the lamp tube, but this light will soon disappear. If the shimmer with rolling feeling is flashing all the time, it means that the switch of your home is connected to the zero line and the lamp is connected to the live line, so there will be a small current passing through and shimmer.