Difference between incandescent, fluorescent, CFL and led

Incandescent , fluorescent lamps, energy-saving lamps and led in the concept, working mechanism and service life of the difference.

1, the concept of different

Incandescent lamp: the longest history of a lamp, its different uses and requirements, incandescent lamp structure and components are different, it will be low-cost, color rendering good characteristics.

The fluorescent lamp: also known as fluorescent lamps, simply a closed gas discharge tube, the main gas inside the tube for argon (argon) gas (another contains neon neon or krypton krypton) gas pressure of about 0.3% of the atmosphere. Also contains a few drops of mercury - the formation of trace mercury vapor.

Conserving light: electronic light bulb. It was first invented by foreign manufacturers in 1978, with small size, long life, easy to use, energy-saving effect is obvious and so on, by the world's various countries and regions welcome.

led: also known as light-emitting diode, it is a solid-state semiconductor devices, can be directly converted into light.

2, different working mechanisms

Incandescent lamps: when the lamp into the circuit, the current flows through the filament, the thermal effect of the current, so that the incandescent lamps emit a continuous visible and infrared light, this phenomenon in the filament temperature rises to 700K can be perceived, but due to the high temperature of the filament, the energy of its energy to the infrared radiation will also be wasted, evaporate faster, the service life is also greatly reduced.

The fluorescent lamp: the use of low-pressure mercury vapor in the power release of ultraviolet light, so that the phosphor emits visible light of the principle of light-emitting, so it belongs to the low-pressure arc discharge light source.

Energy-saving lamps: the use of the principle of gas discharge operation, it is with a compact with a ballast of a fluorescent lamp, in the use of the ignition process, it will be through the electronic ballast to the lamp and other dead heating and then the filament of the beginning of the emission of electrons, electrons in the collision to the lamp within the argon atoms, argon atoms after the collision of the energy will be thus a succession of go to the impact of the internal.

led: the heart of the LED is a semiconductor wafer, one end of the wafer attached to a bracket, one end is the negative pole, the other end is connected to the positive pole of the power supply, so that the entire wafer is encapsulated in epoxy resin. The semiconductor wafer consists of three parts, one part is a P-type semiconductor, in which holes dominate, the other end is an N-type semiconductor, which is dominated by electrons on this side, and in the middle is usually a quantum well of one to five cycles.

When an electric current is applied to this wafer through a wire, the electrons and holes are pushed into the quantum well, where the electrons are compounded with the holes, and then energy is emitted in the form of photons.

3, service life

Incandescent lamps: shorter service life, usually within 1,000 hours;

Fluorescent lamps: generally in the 2500 - 3500 hours or so.

Energy-saving lamps: service life but more than 6000 hours.

LED: life expectancy is generally around 100,000 hours.

Light bulb tips:

1, first look at the appearance of the light bulb, its appearance should be overall clean, uniform and no scratches; secondly, touch the bulb surface of the surface of the various parts of the bulb, should be a smooth surface, no obvious feeling of stinging; again, shake the bulb, the internal should be no abnormal ringing, such as the internal ringing, may be due to its lamps and lanterns Internal components are not fixed or have debris, it is very easy to cause a short circuit inside the lamp and damage the lamp.

2, when buying lamps, in addition to consider the illumination, that is, wattage, but also learn to consider the color temperature.

3, only to obtain safety certification of the product, in the safety, performance and quality assurance. These signs generally appear in the product packaging or box inside the product manual, consumers must carefully check when selecting LED bulbs.