incandescence

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Incandescence

The emission of visible radiation by a hot body. A theoretically perfect radiator, called a blackbody, will emit radiant energy according to Planck's radiation law at any temperature. Prediction of the visual brightness requires additional consideration of the sensitivity of the eye, and the radiation will be visible only for temperatures of the blackbody which are above some minimum. The relation between brightness and temperature is plotted in the illustration. As shown, the minimum tem-perature for incandescence for the dark-adapted eye is about 390°C (730°F). Under these ideal observing conditions, the incandescence appears as a colorless glow. The dull red light commonly associated with incandescence of objects in a lighted room requires a temperature of about 500°C (930°F). See Blackbody, Heat radiation

Relation between brightness of blackbody and temperatureenlarge picture
Relation between brightness of blackbody and temperature

incandescence

[‚in·kən′des·əns]
(optics)
The emission of visible radiation by a hot body.

incandescence

The emission of visible light as a result of heating.
References in periodicals archive ?
By comparison, incandescent bulbs cost about a dollar each, although prices will probably increase as they become scarce because of the government requirement.
incandescent lamp AKG 12-55-1 H3 or analog-43800 pieces
Since September 2012, retailers in the European Union have been banned from selling incandescent bulbs for domestic use following a union-wide directive aimed at reducing energy use for lightning.
The earliest example of this is perhaps in 1881, when the Savoy Theatre in London became the first building to be lit by a type of what we would now term 'fairy light' incandescent electric light bulbs.
The opportunity is tremendous--in the hospitality sector alone there are approximately 1 billion incandescent bulbs that will have to be replaced, and in many cases these bulbs will have to be dimmed to deliver flexibility and proper aesthetics.
Some specialty types of incandescent light bulbs, such as reflectors, three-way, appliance, and some decorative bulbs, are exempt from the law and can still be manufactured.
Incandescent bulbs are much less efficient than most other types of electric lighting because it converts less than 5% of the energy they use into visible light.
and more than 3 billion of them still use the standard incandescent technology that hasn't changed much in 125 years.
Consumers have been slow to accept CFLs, largely because they cost three to four times more than incandescent bulbs, which often cost $1 or less.
Durable: LEDs do not have a filament, so they are not damaged in circumstances when a regular incandescent bulb would be broken.
Wednesday Bulgarian Pressa daily writes that retailers are labelling the incandescent bulbs as "lights with a special purpose.
The Chinese National Development and Reform Commission (NDRC) began as the first step to ban sale and import of incandescent bulbs above 100 watt.