Is there a bike light law?

You don't share my ability to read English either.

I don't share your poor eyesight

Tree Trunks, you're an hilarious Troll.

I've enjoyed reading your input into this important topic and I take comfort in the fact that your (intentionally?) ridiculous statements would make even the most lackadaisical person into a more careful, bike-light-using individual...just to be less like you.

I think other people have already covered the important details - anyone without bike lights is not only endangering themselves but also risking the psychological well-being of the poor sod that has the misfortune of killing them.