Different Types of Bulbs

Thanks to my first ticket on the characteristics of the bulbs to know, you can choose the one that suits you best according to your needs. No need to tear out hair on that side.

But reserve the other side of your head on another essential factor: the type of bulb (Discover definitions of bulb in DigoPaul). There are plenty on the market and that is why I limited myself voluntarily to the four most common technologies in our homes. Each with its advantages and disadvantages (as always).

The incandescent light bulb

It is the arch bulb, invented in 1878 by Thomas Edison, who has revolutionized the world. Our great-grandparents knew but this may not be the case for our little ones-grandkids because it fades out of the market. Because of its very poor performance: 95% of the energy it consumes is transformed into heat. No wonder then that we we burn fingers on it, knowing that the temperature of the bulb can be up to 150 ° C. Despite this disadvantage, it was the star because she was the only technology available until now. Besides, she was not expensive, offered a wide variety of forms and powers and provided a good indication of colours (near 100 IRC).

Different Types of Bulbs

And how does it work? Wrapped in a glass vacuum bulb, a filament of tungsten is carried incandescent by the passage of an electric current. This will cause a sublimation (passage from the solid state to the vapor State) of tungsten, where a thickness of the filament more and finer in the course of the time. Until the famous moment where the lamp ‘break ‘. The steam produced is deposited on the walls of the bulb, then contrast medium and reducing its efficiency. Thus, the average life expectancy is 1000 hours, which is short.

The halogen bulb high efficiency

It’s now the bulb that looks the most like the light bulb filament. the light produced is identical (IRC close to 100 also) and yet this technology consumes less energy. A 70 Watt halogen bulb illuminates as much as a conventional 100 watt incandescent. Halogen bulbs are also all possible forms, as well as a wide variety of units. However, halogen lamps do not have a very long life expectancy and they still emit too much heat (93% of the consumed energy is converted into heat).

Here again, a filament of tungsten is carried at high temperature to shine in the visible and produce light. Unlike close only a gas of the family of the halogens (fluorine, bromine or iodine) is added in the glass bulb. This compound combines with vaporized tungsten and settles on the filament. The latter is renewed so and lasts more long (from 2000 to 4000 hours). The other benefit is the less important deposit of vapours of tungsten on the aprois of glass.

The CFL

More known under the term “light bulbs low consumption”, they work on the same principle as a fluorescent tube (or neon tubing). It is indeed a fluorescent tube that is folded back on itself, where Forms features in spiral. They last 6 to 10 times longer than conventional incandescent bulbs produce about 80 percent of light for only 20% of heat (70 ° C) Risk of burns are so heavily discounted. And finally, they are recyclable to 97%. The main disadvantage is the ignition time to get optimal light. It will therefore choose models with instant ignition to the places of passage (corridors, toilets, bathroom). The rendering of colors, this time is lower, in the vicinity of 80-85.

The operating mode is very different from that of conventional incandescent or halogen bulbs. Remember that it is a fluorescent tube in folded and miniature version.

  1. The base of the bulb is home to electronic components that provide continuous light, otherwise the lamp shuts off and turns on 100 times per second.
  2. At the cathode of the tube, a tungsten filament is heated and produces electrons. An electric arc then spread inside the tube causing a steady back and forth of electrons.
  3. The electrons hit atoms of mercury in the tube, which emits ultraviolet (UV) light invisible to the naked eye.
  4. Ultraviolet face a fluorescent layer on the surface of the tube, composed of salts for phosphors. They react to UV emitting a white light visible.

The presence of mercury in the CFL, toxic metal, requires some caution in case of breakage. If inhalation of Mercury poses no risk (between 1 and 5 milligrams so that a thermometer contained 500 milligrams to 2 grams!), it is advisable to protect hands for picking up debris from glass to avoid that the mercury gets into the blood. Hence the need to drop them into a specific bin for recycling. On the other hand, the CFL bulbs have a life more high (an average of 8000 hours) but they resent the markets/stops repeatedly.

The LED lamp

Created in 1962, the LED (or DEL in french) are remained long confined to use as a light bright on an electronic device. Today, technological advances have facilitated their expansion because they have many advantages over incandescent bulbs. Among others: reduced energy consumption very (80% yield), very long (up to 100,000 hours), good life made of colors (more than 85), number of cycles power very high, etc. The price of the bulbs to LED technology remains high today, but continues to decline as a result of their widespread use. IMHO, the LEDs are the future for lighting technology, at least for now.

And how does a LED? Each diode consists of two thin semiconductor (cathode and anode) which are connected by a wire. Once powered by an electric current, they produce light thanks to the phenomenon of electroluminescence. That is, a material emits light in response to an electric current running through, unlike an incandescent bulb which emits light due to the temperature. The anode and cathode are located just below the cup of reflection. It’s role is to lead the rays in space. This device is protected by a capsule of epoxy resin. The color emitted by an LED depends on the materials constituting the semiconductors. For example, the phospho-arsenide of gallium is used for orange LED manufacturing. White LEDs are usually composed of phosphors.

Apparently, there is a risk on the vision if we use bulbs that show related LED. They would produce a slightly bluish light that can aggravate the AMD (related macular degeneration at Age). When in doubt, it is better to use bulbs that do not see the LED. For this, I can only recommend this guide full of LED bulbs to make the right choice with confidence.

Phew, it’s over! This condensed version of technology from us and we barely conscience. Who knows what the future will bring more light surprises? Follow!

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