In message ews.net,
":::Jerry::::" wrote

My point is that if it is deemed unsafe to have a rear light below
a
certain wattage on a car why wasn't the _same_ legislation applied
to
bicycle lights?

How many cycles do you know (outside of road racing) that can do
50mph, let alone 70 (or more) mph?

A bicycle travelling at 5 mph and a car following at 55mph gives a
closing speed of 50mph.

--
Alan