Incandescent lamp is also known as light bulb, it works by filament generate the heat by the current(tungsten wire, the melting point of 3,000 degrees Celsius), helical filament continued to gather heat, so that the filament reach the temperature of 2000 degrees Celsius, it is in incandescent state, it can emit light, as the same like red-hot iron to light. The higher the temperature of the filament, the brighter light, so it is called incandescent. When incandescent lamp light, a large amount of energy turn into heat, only a few (probably less than 1%, not calculated) can be transformed into useful energy.
Incandescent light is given full shade, but the proportion of shade from the light emitting element material (tungsten) and the temperature of the decision. Ratio imbalance has led to a light color cast, so the color of the object under incandescent lamp not true.
Incandescent lamp with the filament temperature, since the higher the temperature, the easier the filament sublimation. Fluorescent black at both ends of the process are: the sublimation of tungsten tungsten gas directly into these lower temperatures encountered in gas tungsten lamp wall and condensate in the tube wall and black, when the tungsten L
China to the more slender, the power after it is easy to blow, ending the life of the lamp. Therefore, the greater the power of incandescent lamps.
Also known as fluorescent lamps, it works: Simply put fluorescent tubes gas discharge tube is closed. The main gas pipe for the argon (argon) gas (also contains neon neon or krypton krypton) atmospheric pressure of about 0.3%. Also contains a few drops of mercury – the formation of trace amounts of water silver steam. Mercury atoms about one-thousandth of all the gas atoms ratio.
Fluorescent tubes are relying on atomic mercury lamp, gas discharge process by the release of UV light (wavelength of 2537 angstroms main = 2537 × 10-10m). Energy consumed by about 60% can be converted to UV light. Other energy is converted to heat.
Fluorescent light from the fluorescent lamp inside surface of the material after the release of visible light absorption of ultraviolet light. Different fluorescent substance emits visible light different. General efficiency of UV light into visible light is about 40%. Therefore, the efficiency of fluorescent lamps is about 60% × 40% = 24% – about the same power tungsten lamp twice.
Also known as energy-saving compact fluorescent lamps (CFL lamp abroad referred to) has a high luminous efficiency (5 times the ordinary light bulb), significant energy savings, long life (which is 8 times the normal light bulb), small size, ease of use. It works basically the same and fluorescent lamps.
Energy-saving lamps in addition to white (cold) outside, there is also warm light. In general, under the same wattage, an energy-saving 80% energy saving than incandescent lamps, eight times the average life expectancy, only 20% of thermal radiation. Non-stringent conditions, a 5-watt energy-efficient lighting can be considered as such according to
25-watt incandescent lamp, according to 7-watt energy-saving light equivalent to about 40 watts, 9 watts equivalent to about 60 watts.
LED light Bulbs
LED is Light Emitting Diode, it is a solid-state semiconductor devices can be directly into electricity to light. The heart of the LED is a semiconductor chip, the chip attached to a bracket on one end, one end is negative, the other end to connect the positive power supply, so that the whole chip is epoxy encapsulated.
Semiconductor chip consists of three parts, part of P-type semiconductor, the hole are dominant in it, the other side is the N-type semiconductor, this side mainly has electronics, the middle is usually 1-5 cycles of the quantum well. When the current through the wire act on the chip, electrons and holes will be pushed to the quantum wells, the electron in the quantum well with hole recombination, and then it will be issued in the form of photon energy, which is the principle of LED light.
LED lamps(cheap led light bulbs) have advantages such as small size, low power consumption, long life, non-toxic environmental protection and so on, LED lighting gradually developed into home lighting from outdoor decoration and lighting projects.