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Incandescent light bulbs consist of a glass enclosure (the envelope, or bulb) which the bulb with an inert gas reduces evaporation of the filament and reduces the required strength of the glass. Inside of the bulb is a filament of tungsten wire, through which an electrical current is passed. The current heats the filament to an extremely high temperature (typically 2000 to 3300K depending on the filament type, shape, and amount of current passed through). Heated electrons in the continuous energy bands of tungsten become excited and then transition to lower energy states of the solid. As they do, they release thermally equilibrated photons which have a black body spectrum. This spectrum, unlike those caused by non-equilibrium atomic or molecular transitions such as in a mercury-vapor lamp, is continuous, typically peaking in the visible light but also containing significant energy in the near-infrared wavelengths.
Twisted Candle Incandescent Globes
Candle shaped mains voltage lamps with a twisted glass bulb designed to enhance the appearance of decorative pendants, chandeliers and wall brackets.

Fancy Round Globes 10 Pack
- Available in 25, 40 & 60 watts
- Available in Small edison screw (E.14), Edison Screw (E.27), Small Bayonet Cap (B.15) & Bayonet Cap (B.22) Base types.

Plain Candle Globes 10 Pack
These multi-purpose globes are commonly used in chandeliers and pendant fittings. We also have limited stock of Twisted Candles in some configurations.

See Incandenscent Light, Infrared Lamp Range > Click Here
Incandescent light bulbs usually also contain a glass mount on the inside, which supports the filament and allows the electrical contacts to run through the envelope without gas/air leaks. Many arrangements of electrical contacts are used, such as a screw base (one or more contacts at the tip, one at the shell), a bayonet base (one or more contacts on the base, shell used as a contact or only used as a mechanical support), and for some lamps an electrical contact at either end of a tubular lamp. Contacts in the lamp socket allow the electrical current to pass through the filament. Power ratings range from about 0.1 watt to about 10,000 watts, and up. To improve the efficacy of the lamp, the filament usually consists of coils of fine wire, also known as a 'coiled coil'. For a 60 watt 120-volt lamp, the length of the filament is usually 6.5 feet or 2 meters.

One of the smallest problems of the standard electric light bulb is evaporation of the filament. The largest problem is that the inevitable variations in resistivity along the filament cause non-uniform heating, with "hot spots" forming at points of higher resistivity. Thinning by evaporation increases resistance in places. But hot spots evaporate faster, increasing their resistance faster—a positive feedback which ends in the familiar tiny gap in an otherwise healthy-looking filament. Irving Langmuir suggested that an inert gas, instead of vacuum, would retard evaporation and still avoid combustion, and so ordinary incandescent light bulbs are now filled with nitrogen, argon, or krypton. However, a filament breaking in a gas-filled bulb can pull an electric arc, which may spread between the terminals and cause very heavy current flow; intentionally thin lead-in wires or more elaborate protection devices are therefore often used as fuses built into the light bulb.

During ordinary operation, the tungsten of the filament evaporates; hotter, more-efficient filaments evaporate faster. Because of this, the lifetime of a filament lamp is a trade-off between efficiency and longevity. The trade-off is typically set to provide a lifetime of hours for ordinary lamps. See the section below, Voltage, light output, and lifetime, for a discussion of the trade-offs involved in setting a lamp life specification.

In a conventional (not halogen) lamp, the evaporated tungsten eventually condenses on the inner surface of the glass envelope, darkening it. For bulbs that contain a vacuum, the darkening is uniform across the entire surface of the envelope. When a filling of inert gas is used, the evaporated tungsten is carried in the thermal convection currents of the gas, depositing preferentially on the uppermost part of the envelope and blackening just that portion of the envelope.

Some old, high-powered lamps used in theater, projection, searchlight, and lighthouse service with heavy, sturdy filaments contained loose tungsten powder within the envelope. From time to time, the operator would remove the bulb and shake it, allowing the tungsten powder to scrub off most of the tungsten that had condensed on the interior of the envelope, removing the blackening and brightening the lamp again.
Please, click on a link below to view more information and buy them online:
10 Pack 25 Watt Silver Top SBC Fancy Round Globes Buy Now
Architectural Linear Incandescent Lamps Buy Now
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E12 240V 40 watt Pearl Candle Globes (10 pack) Buy Now
Fancy Round Globes 10 Pack Buy Now
Flicker Flame Candle Globes (Twin Packs) Buy Now
Globolux - White Ball Shape Buy Now
High Power GLS Incandescent Globes 20 Pack Buy Now
Mains Voltage GLS Blacklight Blue Lamp Buy Now
Plain Candle Globes (10 Pack) Buy Now
Twisted Candle Incandescent Globes (10 Pack) Buy Now
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