Incandescent Light Source

The most obvious example is an incandescent light bulb because of its name electricity flows through a thin wire filament causing it to heat up and glow.

Incandescent light source.

Halogen lights produce a more constant light output over time without much dimming. White hot iron in a forge red lava flowing down a volcano and the red burners on an electric stove are all examples of incandescence. Other examples off the top of my head. Incandescent light is emitted from a heated object.

Luminous efficacy of a light source is the ratio of the visible light to the total power input to the source such as a lamp. They are made in an extremely wide range of sizes wattages and voltages. Although inefficient incandescent lamps possess a number of key advantages they are inexpensive to buy turn on instantly are available in a huge array of sizes and shapes and provide a pleasant warm light with excellent color rendition. The incandescent light bulb or lamp is a source of electric light that works by incandescence which is the emission of light caused by heating the filament.

To emit white light an object must be heated to at least 1 341 f 727 c. Incandescent light is given off when an object is heated until it glows. Incandescent lamps are often considered the least energy efficient type of electric lighting commonly found in residential buildings. An incandescent light bulb or light source is any device that uses electricity to heat a filament or wire until it is hot enough to glow white.

If that were done in the open air in the presence of oxygen the metal filament would burn up before it got that hot. Halogen incandescent lamps will use less power to produce the same amount of light compared to a non halogen incandescent light.