In most modern household lighting installed incandescent, and fluorescent. What is their specificity? What distinguishes the incandescent lamp from a lamp luminous?
The content of the article
- What is a bulb?
- What is a fluorescent lamp?
- The difference between incandescent lamp and fluorescent lamp
- Comparison table
What is a bulb?
To the lamps of the corresponding type are artificial light sources in which light rays are formed due to the special heating element — the filament using an electric current. Modern lighting fixtures the item, usually made of tungsten or other refractory material.
In the structure of the filament lamp bulb is also present. It is, in fact, is the body of the filament, to which is supplied an electric current. In a flask, usually there is an inert gas or vacuum is provided, the absence of any gases. This is necessary in order that the metal body of the filament does not oxidize under the influence of the oxygen in the air and did not enter into chemical reactions with other atmospheric gases.
The main advantages of incandescent lamps:
- low cost;
- environmentally friendly;
- the formation of the luminous flux of approximate in their structure to the sunlight, familiar to the human eye.
It should be noted that the classical tungsten filament lamps characterized by a high level of energy consumption. Therefore, their use becomes some sectors are less common. For example, many apartment owners prefer to abandon incandescent bulbs in favor of more energy efficient appliances.
There is a particular subspecies of incandescent lamps — halogen lighting devices of the appropriate type. Their specificity is that inside bulbs of these lamps a halogen is introduced — a special gas that is capable of returning particles of the metal evaporating from the filament, back. This significantly extends the service life of the lighting device which modern classic incandescent lamps not too long.
to table of contents ↑What is a fluorescent lamp?
For fluorescent lamps it is customary to include an artificial lighting sources, working on gas discharge principle. In these devices the electric discharge in mercury vapor, forms the ultraviolet rays converted into light radiation by means of phosphors, such as, for example, halophosphate of calcium.
In fluorescent lamps, thus, missing the body of the filament. However, the luminous efficiency of lighting, referred to, tend to be much higher than that of incandescent lamps. Fluorescent devices have a long service life and are characterized by a sufficiently high power efficiency.
Fluorescent lamps are often produced in 2 varieties:
Lamps of the first type most often are used for outdoor lighting — in the courtyards of houses, on the roads. Lighting low pressure, most often used for lighting rooms inside buildings.
The main advantages of fluorescent lamps:
- high energy efficiency;
- the opportunity to choose lighting in different shades;
- long service life — up to several tens of thousands of hours.
Fluorescent lamps, however, is not too environmentally friendly because they contain mercury vapor. Appropriate lighting after use, require disposal according to special rules.
It may be noted that some common varieties of household fluorescent lamps traditionally referred to as energy saving. Indeed, thanks to high energy efficiency lighting devices of the appropriate type allow apartment owners to save money when paying for electricity.
to table of contents ↑the Difference between incandescent lamp and fluorescent lamp
The main difference between incandescent lamps from fluorescent lamps is in the principles of: a lighting device of the first type operates by heating a metal filament (if to speak about modern products), while the fluorescent — based on gas discharge principle, by converting ultraviolet radiation into the visible. Vary the types of bulbs also cost, energy efficiency, environmental friendliness, the structure formed by the luminous flux in many cases for life.
Reflect more clearly what the difference between an incandescent lamp and a fluorescent lamp, a small table.
to content ↑Comparative table
Forms a luminous flux by heating the filament (typically metal)
Forms a luminous flux by converting ultraviolet rays into visible light radiation
Less energy efficient
More energy efficient
More environmentally friendly
Less environmentally friendly (contains mercury)
Usually has a shorter lifetime (this concerns modern incandescent lamps of the classical type, not halogen)
Usually has more long service life
Usually costs more