Half a croissant, on a plate, with a sign in front of it saying '50c'
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fibre optics

 Fiber optic functions on bicycle
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How do you check your rear lamp on your bicycle is bright while riding your bicycle at night?. Get a fiber optic cable to run from yor rear lamp to the handle bar to indicate the brightness.

You can also use a fiberoptic cable and lamp to indicate which gear you are in. When a small mirror attached to the gears moves it will illuminate a different fiber for each gear.

A fiber optic cable wrapped around the frame with a cracked outer cover will light up your bicycle.

—pete anderson, Mar 25 2001

Glowire http://www.glowire.com/
I nabbed this link from Jutta's 'Broomcycle' idea. [StarChaser, Mar 25 2001]

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       Welcome to the Halfbakery! Good idea - there should be more fibre-optics on bicycles
—hippo, Mar 25 2021
   

       //Welcome to the Halfbakery!// I hope that's not been on your to-do list these last 20 years, you'll be running out of things to do at this rate.
—zen_tom, Mar 25 2021
   

       There are a *lot* of things on my to-do list
—hippo, Mar 25 2021
   


 

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