Buzzing noise in headphones when LEDs are on

[Haxorboy]

I have lights behind my desk, which are plugged in to an AC power adapter. When I turn the lights on, I get a weird buzzing noise in my headphones, which disappears immediately when the lights are turned off. I never used to get this problem until I added the power adapter to use my PS4 at my setup, was wondering if I could solve this without having to remove the adapter.

 

[scout_03]

do you use the ps4 adaptor for light or for the ps4 only also light could be having reverse wire and not ground .