Day time running lights on cars.
Why i ask thee !!!???
"Oh i need to be seen cos the great big fook off Range Rover I'm driving might just go unnoticed and get crashed into"
I agree with you but it's because of European legislation:
And utterly unecessary.
Do you have difficulty seeing that 2 ton van in perfect day light?
In the winter months when the sun is low and quite often blinding when driving the day time running lights come in very useful, I find anyway.