Originally Posted by
rekmeyata
Light during the day WILL NOT prevent front accidents. Those dopes driving cars either don't care if they turn in front of you, or they didn't see you, in either case a light will not stop them from doing what they do. If you can't see a cyclist in broad daylight there's no hope for you! This has been proven with motorcycles, they run with their lights on during the day and they still get hit, and their lights are much larger and brighter then little bicycle lights that would be completely unnoticeable in the day light.
Yet it's also been proven with motorcycles that daytime running lights significantly
reduce accidents, and modulated headlights do so more than steady headlights.
Nothing will prevent all accidents, but turning your back on substantial improvements because they aren't perfect is counterproductive.
Personally, I use a smaller helmet-mounted headlight that definitely helps with being seen by cars. I don't run it most of the time in daylight, but turn it on for areas with difficult visual environments or fast traffic.