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2. Bicycle lighting - Wikipedia

   en.wikipedia.org/wiki/Bicycle_lighting

   Red light on the back of a bicycle Early bicycle lighting: candle lamps, oil lamps and carbide lamps Early bicycle lamps and two early bottle dynamos (1935). Bicycle lighting is illumination attached to bicycles whose purpose above all is, along with reflectors, to improve the visibility of the bicycle and its rider to other road users under circumstances of poor ambient illumination.

3. Beryl (company) - Wikipedia

   en.wikipedia.org/wiki/Beryl_(company)

   Its founder Brooke developed the "Laserlight" bike lights which are now used as part of Santander Cycles, London's public bike hire scheme.This light projects an image of a bicycle, in green, onto the road about 6 metres (20 ft) ahead of the bike, visible round corners and in blind spots.

4. Bottle dynamo - Wikipedia

   en.wikipedia.org/wiki/Bottle_dynamo

   Bottle dynamo mounted on a bicycle. Dismantled bottle dynamo. Left: Housing with internal permanent magnet rotating through the friction wheel. Right: Induction coil. A bottle dynamo or sidewall dynamo is a small electrical generator for bicycles employed to power a bicycle's lights.