1. If there is no way to automatically sense, there may be a problem with the sensor and a new sensor needs to be replaced. If it cannot be replaced, it needs to be replaced by professional maintenance personnel.
2. The sensor light is off. It could also be an open circuit or ground in the power wire before the light switch, a bad or unclosed bimetallic contact on the light switch, a bad light switch, or a tripped or blown fuse in the circuit.
3. The reason why the sensor light is not on is different, and different maintenance methods are required. For example, a light switch needs to be replaced if the switch is broken, or needs to be reconnected if there is a bad contact.
4. The sensor light is off. It is also possible that the inside of the bulb is broken or the bottom wire of the lamp holder is not installed properly. This problem cannot be solved by yourself. You need to have it repaired by a professional electrician.