LED lighting may be proliferating on new cars, but generally it can't be added later to the older, used cars many people have in their driveways. One exception is the ZEVO LED headlight from Sylvania, ...

A website touting the Sylvania SilverStar headlight bulb says it provides "up to 30 percent" greater visibility down the road. That sounds impressive until you read the fine print: "compared with worn ...