I have the same problem as most, except occasionally both bulbs and what appears to be the back bulbs too go out leaving my car completely dark, interior lights are sometimes included. A quick off/on of the light switch and the lights are back to normal, and like Joshp I will intermittently turn my lights off then back on so I can control the darkness. I love my Lexus, but feel very unsafe in it, as the lights could go dark and I cant respond quick enough or oncoming traffic will not see me around a curve. I took the car in a couple of years ago to my Lexus dealer and they told me the car battery was weak and causing the problem, shortly thereafter I did replace the battery, but that did not solve the problem. When I bring it to Lexus they only test it during the day. Still don't know what the problem is. I had the car in for the fuel pump recall and they recheck and said they could not reproduce the problem, I felt like they were telling me I was lying.