Bulbs: halogen, fluorescent or incandescent
Some light bulbs are safe for the environment than others. To determine what, just compare the amount of energy theyuse for the job. And halogen lamps, incandescent lamps provide light by heating a tungsten wiring current voltage. In contrast, compact fluorescent lamps (CFLs) produce light in a completely second principle. Fluorescent gas inside the bulb in the presence of an electric current begins to ultraviolet light, and the lamp cover transforms these rays into visible to the human eye. This fluorescent lamps are much more efficient than incandescent bulbs (from 67% to 80%). Halogen lamps - it's something in between, because they are more effectures are than incandescent bulbs, but less practical than fluorescent.
The light output
Unit light - lumen, which is characterized by the amount of light produced per watt of energy. In order that the light source was a 100% effprojective, it is, in theory, should provide 680 lumens of light per watt. Luminous is the fluorescent lighting: between 9 and 11%most CFL while as incandescent bulbs have only 1.9 to 2.6% efficiency. Returns luminous efficiency halogen lamps ranges somewhere around the middle of 3.5%. Thus, the luminous efficiency is one of the selection criteria for light bulbs and fluorescent lamps are the most effective, followed byhalogen, and then - incandescent bulbs. Another criterion for comparison - this is the number of watts needed for the production of the same amount of light. For example: for incandescent bulbs need 60 watts of power, in order to give the same amount of light as a fluorescent able to just 15 watts. Lamp manufacturers must be listed on the packaging as the number of lumens, and the number of watts used lamp so that the consumer was easier to calculate their light output and efficiency levels. < / span>
Halogen lamps versus conventional incandescent lamps
Both of these lamps produce light by tungsten filament wired cabley. In the conventional tungsten incandescent bulbs slowly evaporates and is deposited on the inner surface of tubess, until the wire devices do not become too thin: if he could not get conducts current and lamp burns out. Halogen lamp filled with a special gas, under the effect ofwhich couples it back into the deposited tungsten wires and not on the inner surface of the lamp. Halogen lamps do not burn longer and stronger than conventional heated, which in turn increases their effectiveness. However, these benefits may be offset by additional demand for cooling the room is illuminated by these lamps.
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The impact of climate
In warmer climates fluorescent lamps are much more efficient than conventional . About 90% of the energy used by an incandescent lamp is transformed into heat for fluorescent lamps, this figure, for comparison, only 30%, and thus Venigaetsya energy savings. When the weather is hot, the use of fluorescent lamps reduces not only the use of electricity, but also the load on the air conditioning . But cold weather is fair to say otherwise. No additional heating incandescent need more gas or fuel for aboutheating homes and offices. Where electricity is cheap or not acquired cn resources, switching to fluorescent lamPy can really only increase the costs of heating and, as a consequence, the level of carbon dioxide emissions.
The new energy-efficient incandescent light bulbs < / h3>
A recently developed a new type of halogen lamps. On the surface smeared with a special infrared coating. They direct the infrared light back to the tungsten wire, reducing the heat and thus giving 30 percent advantage in comparison with conventional light bulbs. They are still not as efficient as fluorescent, which bypasses the normal bulbs as much as 75%, but among themselves like this kind of halogen lamps is the leader.
Manufacturers of LED lamps
The most well-known manufacturers of LED lamps are considered:
- Nichia Corporation
- Samsung LED
- Osram Opto Semiconductors
- LG Innotek
- Seoul Semiconductor
- Cree Inc.
- Philips Lumileds Lighting Company
- TG-Light Optoelectronic
- Everlight Electronics span >