Originally Posted by
Tourist in MSN
Red...
I read on the internet that some function of reflectivity+acuity resulted in amber reflectors appearing '3X brighter' than red reflectors.
"
If you see it on the internet, it must be true."
Notwithstanding, both here in Parts Unknown and in the International Convention of Road Traffic (1968), bikes are required to show a
red reflector to the rear when operated at night.