Originally Posted by
Univega
Which are?
Increased possibility of being forced off the road or hit.
I added front an rear lights a few years ago when on a sunny and clear day, I went under a long highway underpass and was almost hit. The driver stopped at a light and said they never saw me. In the early mornings there are deep shadows which it's easy not to be seen. In the winter when the sun is low in the sky it's good to have a front light when going north and a rear light when going south so the drivers can see you in the suns glare.
I guess if i was riding farm roads in the midwest I wouldn't need lights, but I live on Long Island the home of the 110# soccer mom (and dads) in a 6000# SUV who's multi tasking as they drive.
Being told "sorry I didn't see you" as i'm laying on the ground won't make me feel any better.