I installed the fog lights a month or so ago, but never was able to test them until yesterday. After installation, I turned on the fog lights on a clear night and was very unimpressed with any difference. But yesterday, it was a little foggy, and I was very impressed with the additional lighting and visibility I got, without any (perceptible) additional glare. I never had fog lights before, so I'm not real sure what I should be expecting. We don't get a lot of fog in Los Angeles, but I live a couple of miles from the ocean, so I get that "marine layer" every so often. Even though the fog lights won't be used much, I'm glad that I have them. If for no other reason, then for cosmetic purposes. When driving up Central California to Sacramento, the fog can get real bad. I think that'll be the real test. Mike