There isnt any e mark or type approved mentioned on that last link either.
I done this to make my car more visible to other road users, other road users can see the car far better than the standard sidelights, so you dont have people pulling out in front of you because they couldnt see you i.e; somebody pulling out of a junction with the sun blinding them and not being able to see the car coming.
I rest my case on that one, you got a valid point there the more your car is visible to other road users the better.