Undergrad Fluorescent lamps And Fan remote

[Aryamehr]

Hi everyone. I hope you are doing great . I recently saw something interesting and had a question. I use fluorescent lamps in my room, and when I use the remote fan, it works at a shorter distance, but when the lamps are off, the remote works at a longer distance. What do fluorescent lamps do that affects the operation of the remote?

 

[Aryamehr]

This lamp !

 

[Baluncore]

Welcome to PF.

What do fluorescent lamps do that affects the operation of the remote?

I expect the fan uses an IR remote control.
The switching of the FL causes IR, optical, or RF pulses, that are picked up by the IR receiver. That makes it less sensitive because the noise floor is higher.