MY SPOUSE REAR ENDED THE ABOVE VEHICLE. SHE SAYS THAT THE STOP LIGHTS WERE VERY DIFFICULT TO SEE WHEN IN FULL SUN. INCIDENT OCCURRED IN SLOW AND GO TRAFFIC ON A FREEWAY. WHEN EXCHANGING INFORMATION WITH THE DRIVER, HE STATED THAT HE HAD BEEN REAR ENDED JUST RECENTLY DUE TO THE SAME PROBLEM.