Aftermarket headlights noise

Hi everybody,

I just installed aftermarket headlights on my IS250 2007 and I notice that there's a weird sound coming from the headlights when DRLs are on. It goes away if I put it in low beams or high beams. I changed the relays as I also experienced hyperflash on my turn signals. I thought it was the issue, but after changing it, the sound is still there. Have any of you experienced this on aftermarket headlight? Thanks for any input brothers.