Whois & Analysis for bulbs.com

A halogen lamp, also known as a tungsten halogen, quartz-halogen or quartz iodine lamp, is an incandescent lamp that has a small amount of a halogen such as iodine or bromine added.

The combination of the halogen gas and the tungsten filament produces a halogen cycle chemical reaction which redeposits evaporated tungsten to the filament, increasing its life and maintaining the clarity of the envelope.

Because of this, a halogen lamp can be operated at a higher temperature than a standard gas-filled lamp of similar power and operating life, producing light of a higher luminous efficacy and color temperature.

The small size of halogen lamps permits their use in compact optical systems for projectors and illumination.

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation.

It is a form of luminescence.

In most cases, the emitted light has a longer wavelength, and therefore lower energy, than the absorbed radiation.

The most striking example of fluorescence occurs when the absorbed radiation is in the ultraviolet region of the spectrum, and thus invisible to the human eye, while the emitted light is in the visible region, which gives the fluorescent substance a distinct color that can only be seen when exposed to UV light.

Fluorescent materials cease to glow immediately when the radiation source stops, unlike phosphorescence, where it continues to emit light for some time after.

An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire heated to such a high temperature that it glows with visible light (incandescence).

The filament, heated by passing an electric current through it, is protected from oxidation with a glass or quartz bulb that is filled with inert gas or evacuated.

In a halogen lamp, filament evaporation is prevented by a chemical process that redeposits metal vapor onto the filament, extending its life.

The light bulb is supplied with electric current by feed-through terminals or wires embedded in the glass.

Most bulbs are used in a socket which provides mechanical support and electrical connections.

Energy conservation refers to the reducing of energy consumption through using less of an energy service.

Energy conservation differs from efficient energy use, which refers to using less energy for a constant service.

A light-emitting diode (LED) is a two-lead semiconductor light source.

It is a p–n junction diode, which emits light when activated.

When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.

This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor.

LEDs are typically small (less than 1 mm2) and integrated optical components may be used to shape the radiation pattern.