What is this light in my bathroom vent? Humidity sensor?

xfkolqyraredditusername2 asks: What is this light in my bathroom vent? Humidity sensor?

Answer (from Iforgatmyusername): It’s the humidity sensor. No it’s not a camera.

Humidity Sensor Operations for Hampton Bay 80 CFM No Cut Ceiling Humidity Sensing Bath Fan

1 Humidity sensing mode. Move the wall on/off switch to the “ON” position. The LED indicator light in the fan is BLUE. The fan will automatically go on when the humidity level in the room goes above 60%.

2 Full speed mode. Cycle the wall on/off switch to the “OFF” position, then back to the “ON” position. The LED indicator light in the fan is AMBER.

3 Fan off. Move the wall on/off switch to the “OFF” position