Originally Posted by
noglider
So the tail light is pointed at your face? I suppose if the light in your eyes doesn't bother you, it's not a bad idea. You could also put a forward facing white light at the back of your bike to illuminate your body. I've been wondering if this is worth my while.
I ride a recumbent and an upright folding bike so the light hits my torso mainly. I keep the power low so that it's less bothersome.
I read that side-on hits are more common than being rear ended. This is to reduce that risk. From my observations I think it works.