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2. Headlamp (outdoor) - Wikipedia

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

   Headlamp attached to a helmet. A headlamp, headlight, or head torch is a light source affixed to the head typically for outdoor activities at night or in dark conditions such as caving, orienteering, hiking, skiing, backpacking, camping, mountaineering or mountain biking. Headlamps may also be used in adventure races.

3. Dive light - Wikipedia

   en.wikipedia.org/wiki/Dive_light

   Xenon (incandescent) - emit a warm natural light, and tend to be the less expensive, however, offer less brightness and have a shorter battery life than LED or HID lights. LED (light emitting diode) - are very durable, efficient and powerful. HID (high intensity discharge) - are extremely powerful and have a nearly white beam.

4. Headlamp - Wikipedia

   en.wikipedia.org/wiki/Headlamp

   In 2010 the first all-LED headlamps with adaptive high beam and what Mercedes called the "Intelligent Light System" were introduced on the 2011 Mercedes CLS. In 2013 the first digitally controlled full-LED glare-free "Matrix LED" adaptive headlamps were introduced by Audi on the facelifted A8, with 25 individual LED segments. [127]

5. Mechanically powered flashlight - Wikipedia

   en.wikipedia.org/wiki/Mechanically_powered...

   The best designs use a supercapacitor instead of a rechargeable battery, since these have a longer working life than a battery. This, along with the long-life light-emitting diode which does not burn out like an incandescent bulb, give the flashlight a long lifetime, making it a useful emergency light. A disadvantage of many current models is ...

6. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   A headlamp can be clipped to the brim of a hat, or built to mount on a hard hat, instead of using straps; other types resemble eyeglass frames. Similar to the headlamp, an angle-head flashlight emits light perpendicular to the length of the battery tube; it can be clipped to a headband, belt, or webbing or set on a flat surface.

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