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2. Extra-low voltage - Wikipedia

   en.wikipedia.org/wiki/Extra-low_voltage

   Some types of landscape lighting use SELV / PELV (extra-low voltage) systems. Modern battery operated hand tools fall in the SELV category. In more arduous conditions, 25 V RMS alternating current or 60 V (ripple-free) DC can be specified to further reduce hazard. Lower voltage can apply in wet or conductive conditions where there is even ...

3. Bardic lamp - Wikipedia

   en.wikipedia.org/wiki/Bardic_lamp

   3/4 front-left view of British Rail Bardic hand-lamp. The Bardic Rail Signalling Lamp was the original name of a particular type of battery powered railway signalling handlamp made from 1962 by Bardic, Ltd. [1] for use by rail and trackside workers. It became the standard battery operated handlamp in use on British Rail, replacing oil-lit lamps.

4. These Battery-Powered Lamps Are the Solution to Unsightly Wires

   www.aol.com/lifestyle/battery-powered-lamps...

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5. Lantern - Wikipedia

   en.wikipedia.org/wiki/Lantern

   A lantern is a source of lighting, often portable. It typically features a protective enclosure for the light source – historically usually a candle, a wick in oil, or a thermoluminescent mesh, and often a battery-powered light in modern times – to make it easier to carry and hang up, and make it more reliable outdoors or in drafty interiors.

6. Solar lamp - Wikipedia

   en.wikipedia.org/wiki/Solar_lamp

   A garden solar lamp A child in Zambia studying by the light of a lamp charged by solar power during the day. A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter.

7. Timeline of lighting technology - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_lighting...

   1994 T5 lamps with cool tip are introduced to become the leading fluorescent lamps with up to 117 lm/W with good color rendering. These and almost all new fluorescent lamps are to be operated on electronic ballasts only. [4] 1994 The first commercial sulfur lamp is sold by Fusion Lighting.