[QUOTE="L.A."] i always rode with my headlight on, and I got a hip replacement to show for it. it didn't make a lick of difference. [/QUOTE] How do you know you wouldn't have had more accidents without them? I don't think they make a huge difference but the cost to have them is minimal, and I can say for sure that they make oncoming cars more visible to me. It may not be a drastic safety increase but every little bit counts.