Fog Light Switch problems of the 2007 Lexus GS350

I noticed the next day after I purchase the vehicle, that the right headlight was out but the rest were on. I called the dealer and told them about the problem and they told me to bring it in. The next day the lights were on so I didn't take it back. Since then, it happens every time I turn the lights on in the evening. I bought the car without an extended warranty, so I didn't take it back. Since then I have purchased an extended warranty through an outside company, but since I have seen this same problem on several cars similar to mine, I decided to report it before I decided to pay a deductible out of pocket. It's not just the right headlight, sometimes it's the right, sometimes it's both and the fog lights just stay on.