The smoke sensor is flashing white light, as if taking a picture.

Hello, this should be the hotel alarm.

There are some sensors in the hotel that emit white light like flashlights. This should be the hotel alarm. These sensors will come into play when there is a fire in the hotel.

Smoke alarm, also known as smoke detector, will always flash red light under normal circumstances, and it is abnormal to flash white light. It is recommended to take it down for maintenance. The two indicator lights of the smoke detector are designed to observe the running state at 360 degrees. Generally, it flashes when it is normal, and the alarm is always on.