tacoma beast headlights issue

I bought my truck used with the previous owner @Ostrichsak having tacomabeast projector head lights installed. A couple days ago, I was out on a trail at night when my headlights went out (only the hi/low beams, DRLs and fog lights stayed on). I tracked it down to this, what I think is a relay. The only markings on it are "H4", so I'm having a hard time looking for what to search to find a replacement. Any help would be greatly appreciated, thank you