 For the 1234YF system, it's $145.95. So if your air conditioner is not working like it should, come see us at Stotts Automotive next to Waste Management on Highway 61 South. When we see color, we see different wavelengths of light reflected off objects which our brain interprets as brightness, saturation, and hue. But the neural mechanisms that allow this process to occur are not well understood. We'll explore new insights in the U.S. National Science Foundation's Discovery Files.