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Early electrical nightlights used small incandescent lamps or small neon lamps to provide light, and were much safer than small candles using an open flame. The neon versions consumed very little energy and had a long life, but had a tendency to flicker on and off (reminiscent of a candle), which some users liked and others found annoying.
Radioluminescence is used as a low level light source for night illumination of instruments or signage. Radioluminescent paint is occasionally used for clock hands and instrument dials, enabling them to be read in the dark. Radioluminescence is also sometimes seen around high-power radiation sources, such as nuclear reactors and radioisotopes.
In volumetric lighting, the light cone emitted by a light source is modeled as a transparent object and considered as a container of a "volume". As a result, light has the capability to give the effect of passing through an actual three-dimensional aerosol (e.g. fog, dust, smoke, or steam) that is inside its volume, just like in the real world.
"All of the Lights" was universally acclaimed by music critics, who complimented its detailed, maximalist production and dramatic theme. It was commercially successful in the U.S., peaking at number 18 on the Billboard Hot 100 and number two on the Hot R&B/Hip-Hop Songs ; it landed at number 59 on the Billboard Year-End Charts in 2011.
A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure and high pressure.
Lights Out is an electronic game released by Tiger Electronics in 1995. [1] The game consists of a 5 by 5 grid of lights. When the game starts, a random number or a stored pattern of these lights is switched on. Pressing any of the lights will toggle it and the adjacent lights.
Computer graphics lighting is the collection of techniques used to simulate light in computer graphics scenes. While lighting techniques offer flexibility in the level of detail and functionality available, they also operate at different levels of computational demand and complexity.
The largest gas lighting network in the world is that of Berlin, Germany. With about 37,000 lamps (2014), [10] it holds more than half of all working gas street lamps in the world. In central London around 1500 gas lamps still operate, lighting the Royal Parks, the exterior of Buckingham Palace and almost the entire Covent Garden area.