Strange binary sensor

Hardware
1

I discovered this binary sensor between my states and it is about the yeelight ceiling light, but i don’t know what is his use and how and when to use it:

binary_sensor.plafoniera_studio_nightlight

Can someone help me to understand it?

2

That binary sensor should turn on when you activate the night light / moon lamp mode (M button on the remote).

3

Ok thanks and can you give some examples about how to use it in automations or similar?

4

I can’t think of a use for it.