Why?

[djgsa]

 

[DJ123]

You try finding your mighty steed in a packed out Starbucks Car Park without one

 

[Sly]

For those who are in the front, maybe a way to find them quickly? But another gimmick for the Starbucks rider

 

[richh]

I think they are required in some places with deserts?

 

[HxH]

Might be so that a truck driver at traffic stops, high up in their cabs and immediatly behind the bike can see the light when the bike is less visible below his front window.
Sometimes drivers get distracted with looking at something else on the road before moving off, perhaps forgetting biker is still there, who may have stalled.
Good idea, I am all for them.