This is the law in Wisconsin regarding stop lights;

Red Traffic Signal: [346.37(1)(c)4] allows a bicyclist facing a red signal at an intersection, after stopping as required, for not less than 45 seconds, to proceed cautiously through the intersection before the signal turns green if no other vehicles are present at the intersection to actuate the signal and the operator believes the signal is vehicle actuated. The bicyclist shall yield the right-of-way to any vehicular traffic when proceeding through the green signal at the intersection.