Electric light - Wikipedia
The most efficient source of electric light is the low-pressure sodium lamp. It produces, for all practical purposes, a monochromatic orange-yellow light, which gives a similarly monochromatic perception of any illuminated scene.
Electric Light Sources | Sustainability Workshop - VentureWell
There are three main sources for architectural lighting today: incandescent, electrical discharge, and LED. Incandescent lights work by heating a filament until it glows with black body radiation. Electrical discharge (or "gas discharge") lamps pass a current through a gas to split it into a glowing plasma.
List of light sources - Wikipedia
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 ...
电光源 - 百度百科
将 电能 转换为 光能 的 器件 或装置称为电光源。 电光源的发明促进了电力装置的建设，在其问世后一百多年中，很快得到了普及 。 它不仅成为人类日常生活的 必需品 ，而且在 工业 、 农业 、 交通运输 以及 国防 和 科学研究 中，都发挥着重要作用。 将电能转换为光能的器件或装置称为电光源。 人类对电光源的研究始于18世纪末。 19世纪初，英国的H·戴维发明了碳弧灯。 1879年，美国的T·A·爱迪生发明了具有实用价值的碳丝白炽灯，使人类从漫长的火光照明进入电气照明时 …
Timeline of lighting technology - Wikipedia
Source: Practical Electrical Engineering, Newnes. Article entitled "The Development of Electric Lighting". 1879 Thomas Edison and Joseph Swan patent the carbon-thread incandescent lamp .
Light Sources and Types of Light Sources - Natural Light Sources ...
Luminescent Sources: Light can be produced by accelerating charges in a luminescent material. One common way of doing it is by passing current through the material. Example- Fluorescent tube light, electric bulb. Gas Discharge Sources: Passing electricity through certain gases at very low pressure can produce light too. Example – Neon lamp ...
electric light - Students | Britannica Kids | Homework Help
With electric power, light is produced in two main ways. In the common incandescent lamp, current is forced through a fine metal filament that has a high resistance. The energy used in overcoming this resistance produces a white heat, and the filament glows brilliantly.
Electric Light Source and Luminous Efficiency
2022年3月29日 · Electric light sources can generally be divided into two categories: illumination light sources and radiation light sources. The illumination light source is an electric light source that radiates the visible spectrum (wavelength 380-780 nanometers) mainly for human vision for the purpose of illumination.
Energy Consumption and Environmental and Economic Impact of …
2016年1月1日 · Electrical light sources are responsible for an energy consumption of around 1/6 to 1/5 of the worldwide electricity production. Although classic lighting technologies are now mature, the luminous efficiency of the light sources together with their quality of light have not quite reached their limits: there is still room for innovation.
The History of the Light Bulb | Department of Energy
2013年11月22日 · In 1835, the first constant electric light was demonstrated, and for the next 40 years, scientists around the world worked on the incandescent lamp, tinkering with the filament (the part of the bulb that produces light when heated by an electrical current) and the bulb’s atmosphere (whether air is vacuumed out of the bulb or it is filled with ...