The controllers use gyroscopes, bluetooth and IR all. The sensor bar actually EMITS the IR and the control receives it from what I read. Basically halogen crosses into the light frequency of IR. I can attest that this is possible from personal experience. For example, I built a night vision security camera because the CCD in the camera responds to light in the IR range too. So I got a bunch of IR LEDs and wired them up. You can't see the light with the naked eye but the CCD could see it so you had video in a completely black room. I'm guessing that's what COULD happen here with halogen and IR.