I just got back from a mid-day drive and made a point of looking at the prism at a couple of lights that I encountered. I have mine just off right center of the steering wheel, and it gave me a crystal clear view of the two traffic lights, one above each lane. The details of the lights are very easy to discern, including turn arrows. I think you will be pleased with either a Speedway windshield mount or dash mount prism ala GM's from the 50's. I think they actually give more detail in the bright sun than they do at night, but both night & day views are an added value compared to hunkering down to peek through the windshield.