During the latter part of my 50 or so years of driving,practically all of the cars that I have driven have been fitted with these. In the earlier days they were known as 'spot lights', and at that time were generally an extra. I have long doubted their usefulness, and sometimes I have turned them on very briefly to see if they had any benefit. If there was any advantage in using them, it was lost on me, and I find that the standard lights are ample for my requirements when I am behind them, and, if anything, too bright when I am facing them! Why then, is there a new breed of driver, that considers it neccesary to put on his (or her) foglights as soon as dusk falls? Apart from flouting the law, ( I think,)they are just causing inconvenience to other road users. As a grumpy old sod, I suspect that the offender's are somewhat younger than me, and they are under the misguided impression that everyone is immpressed by the fact that they have two extra lights. Same mentality as those who buy the chrome bit for the end of the exhaust I suppose....