Search results
Results from the WOW.Com Content Network
1841 Arc-lighting is used as experimental public lighting in Paris. 1853 Ignacy Łukasiewicz invents the modern kerosene lamp. 1856 glassblower Heinrich Geissler confines the electric arc in a Geissler tube. 1867 Edmond Becquerel demonstrates the first fluorescent lamp. [6] 1874 Alexander Lodygin patents an incandescent light bulb.
This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...
Generally, the natural lighting that goes directly to a photoresistor is used, with the effect of a lamp that automatically turns on at dusk and always goes out in the first light of dawn. Thanks to this system, a wide range of examples of use are created, from lighting both public and private spaces to the simulation of presence, where the ...
Hong Kong illuminated by colourful artificial lighting. Certain other mechanisms can produce light: Electroluminescence; Scintillation; Sonoluminescence; Triboluminescence; When the concept of light is intended to include very-high-energy photons (gamma rays), additional generation mechanisms include: Particle–antiparticle annihilation ...
Artificial light at night refers to any light source other than a natural light source. Sources of artificial light include LEDS and fluorescents. This particular light source has effect on the reproduction, immune function, metabolism, thermoregulation and body temperature of organisms that need light for their daily activity.
The reflector had found favor where the choices of artificial light provided poor illumination compared to modern electric lighting. Light shelves are an effective way to enhance the lighting from windows on the equator-facing side of a structure, this effect being obtained by placing a white or reflective metal light shelf outside the window. [19]
In 1986 Vari-Lite introduced a new series of lighting fixtures and control consoles. They referred to the new system as their Series 200, with the new lights designated "VL-2 Spot Luminaire", and "VL-3 Wash Luminaire". The Series 200 system was controlled by the Artisan console. Vari-Lite retroactively named the original system "series-100".
The transmitted light varies over the day; should this not be desired, light tubes can be combined with artificial light in a hybrid set-up. [27] [44] [45] [46] Some artificial light sources are marketed which have a spectrum similar to that of sunlight, at least in the human visible spectrum range, [47] [48] [49] as well as low flicker. [49]