Originally Posted by
Bmach
As fear as lights being the best during the day, I saw a study once that said high vis and movement was better. From my own experience I have to agree, I see cyclists long before I spot their light during the day. I always wear high vis jersey and matching high vis socks.
Where I drive (and ride), that depends on ambient light conditions. In places where it's bright and sunny, lights are much less effective during the day. Although I do find a flashing front light reduces pull outs. But on shady roads, especially those with twists and turns, I will spot the light of a cyclist well before I would otherwise have seen them. As a driver, I find that helpful as the rider may then disappear around a corner or behind a hill. I already know they're out there, so I'm not surprised if I then crest a hill and find them right in front of me.