Based on several comments on Amazon about this product I decided to add another brake light to my Chevy Silverado. I live in a college town and with over 50,000 students when in full session, the driving gets a little crazy. So I'll do whatever it takes to make myself more visible. This brake light, added to the trailer hitch, does just that. As others have commented, I also noticed that some drivers stop further behind me than is normal. I believe it's because this brake light is the lowest, being in the trailer hitch, and some people stop where they can see the brake lights!