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 classic literature ?
Twelve hundred melting-troughs were simultaneously opened and twelve hundred fiery serpents crept toward the central well, unrolling their incandescent curves.
It was like a moon, but an incandescent moon whose brilliancy was all the more intolerable as it cut sharply on the frightful darkness of space.
These incandescent blocks crossed and struck each other, scattering still smaller fragments, some of which struck the projectile.
Furthermore, incandescent lights produce only 10pc light and 90pc heat, whereas LEDs produce 80pc light and just 20pc heat.
Additional factors, like more stringent energy codes, increases in the cost of electricity and a renewed interest in sustainable building design, have also contributed to the development of more efficient light sources, especially screw-in LED bulbs that can be used as direct replacements for incandescent bulbs.
In addition, governments of various countries have been imposing ban on production and sale of incandescent lights.
On average, switching from an incandescent or halogen lamp to a Bulbrite LED could save consumers $150 in operating costs per lamp over the life of the lamp, say officials.
On the last day of 2013, Mary Cron of Auburn placed seven packages of incandescent bulbs into one of the Barrows Hardware's red shopping baskets along with her other purchases.
Part of the act phases out the production, import and sale of incandescent light bulbs.
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.
GE's existing portfolio of LED bulbs includes a 13 W LED (60-watt incandescent replacement) and a 9W LED (40 W incandescent replacement), which was the first incandescent-shaped (A-19) LED in the world to earn Energy Star qualification.