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2. Headlamp (outdoor) - Wikipedia

   en.wikipedia.org/wiki/Headlamp_(outdoor)

   Being waterproof; Variable light level, and flashing; Motion sensor to allow switching on and off by waving a hand with no need to operate a switch; Optional red light mode to preserve night vision; Both rechargeable and disposable batteries supported, to be able to provide light after the rechargeable battery is discharged

3. 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.

4. Cyclocomputer - Wikipedia

   en.wikipedia.org/wiki/Cyclocomputer

   Wired reed switch sensor with spoke mounted magnet. A cyclocomputer, cycle computer, cycling computer or cyclometer is a device mounted on a bicycle that calculates and displays trip information, similar to the instruments in the dashboard of a car. The computer with display, or head unit, usually is attached to the handlebar for easy viewing.

5. Automotive night vision - Wikipedia

   en.wikipedia.org/wiki/Automotive_night_vision

   Active systems use an infrared light source built into the car to illuminate the road ahead with light that is invisible to humans. There are two kinds of active systems: gated and non-gated. The gated system uses a pulsed light source and a synchronized camera that enable long ranges (250m) and high performance in rain and snow.

6. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   Formerly, the light source typically was a miniature incandescent light bulb, but these have been displaced by light-emitting diodes (LEDs) since the early 2000s. A typical flashlight consists of the light source mounted in a reflector, a transparent cover (sometimes combined with a lens ) to protect the light source and reflector, a battery ...

7. Canon EF lens mount - Wikipedia

   en.wikipedia.org/wiki/Canon_EF_lens_mount

   The EF mount reverses this logic, providing the bayonet on each lens, and a receptacle on the camera body. When the EF mount was introduced in 1987, it had the largest mount diameter (54 mm internal) among all 35 mm SLR cameras. [2] The EF series includes over eighty lenses, encompassing focal lengths from 8 to 1200 mm.