Lights are good in the dark to alert one to a car. But here, with giant diesel 3/4 ton trucks with monster off road tires dominating the road I can hear them long before I see em. The guys who drive these behemoths don't need them for work but for show. Around here we call these guys all hat and no cattle. Some day someone in a prius is going to sneak up on me and kill me cause I won't hear them coming..