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Friends, please tell me what kind of fireplace is this?
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The switch is turned in the "in" direction, but not to the end, so that the light is not yet on. Fixed by a flash between the box itself and directly the switch lever. The idea is that if you pull out the light bulb, the switch at the expense of the springs will reach its extreme position, and the light will turn on. At the end of the light bulb is attached a thread that stretches at some height from the floor. Any unauthorized invasion causes the thread to be strained, the light is pulled out and the light is turned on.
The main disadvantage is the high probability that someone who went in the night for emergencies will forget about this alarm and provoke a false alarm.
This is the technology version of the mid-1980s.
Most likely, there are later and more technological modifications) Possibly even with the "nano" prefix.