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A carbide lamp or acetylene gas lamp is a simple lamp that produces and burns acetylene (C 2 H 2), which is created by the reaction of calcium carbide (CaC 2) with water (H 2 O). [ 1 ] Acetylene gas lamps were used to illuminate buildings, as lighthouse beacons, and as headlights on motor-cars and bicycles.
Paper lanterns are likely derived from earlier lanterns that used other types of translucent material like silk, horn, or animal skin.The material covering was used to prevent the flame in the lantern from being extinguished by wind, while still retaining its use as a light source.
On July 14, 2022, YouTube made a special playlist and video celebrating the 317 music videos to have hit 1 billion views and joined the "Billion Views Club". [ 65 ] [ 66 ] On April 1, 2024, the communications app Discord incorporated a short trailer video into their in-app April Fools' Day prank regarding loot boxes .
Lava lamps An original Mathmos Astro lava lamp A lava lamp is a decorative lamp , invented in 1963 by British entrepreneur Edward Craven Walker , the founder of the lighting company Mathmos . It consists of a bolus of a special coloured wax mixture inside a glass vessel, the remainder of which contains clear or translucent liquid.
A balanced-arm lamp has a base, a stand or body, (in most cases) two connected arms (in many cases fitted with springs), and a lamp-head. The lamp can be moved into almost any position, and the balancing device will maintain the position until moved again. The same overall mechanism can be employed in other devices with similar requirements ...
A miniature keychain lamp produces one or two lumens. A two-D-cell flashlight using a common prefocus-style miniature lamp produces on the order of 15 to 20 lumens of light [11] and a beam of about 200 candlepower. One popular make of rechargeable focusing flashlight uses a halogen lamp and produces 218 lumens. By comparison, a 60-watt ...
The French branch is developing an important link between pedagogical project in Europe and the international cooperation around the world. The NGO wants in Europe to make the new generation aware of the energy poverty reality and show that they can have, with a small activity, a huge social and environmental impact. The NGO wants, as well, to ...
In ancient China, sky lanterns were strategically used in wars, in a similar way as kites were used in ancient Chinese warfare, such as military communication (transmitting secret messages), signaling, surveillance or spying, lighting the sky when laying siege on the city at night etc. However, later on, non-military applications were employed ...