Nowadays, in the green lighting concept advocacy, the emergence of various lighting techniques continuously, fiber optic lighting and LED lamp as the emerging lighting technology, always walk in the forefront of the field of green lighting.
Fiber optic lighting is the light spread abroad through optical fiber light source generator to a designated area of the lighting mode, it has the following characteristics:
1) Due to the linear propagation principle of its characteristics and optical fiber, optical fiber can put the light propagation to any place in theory, meet the diversity of practical application.
2) we can obtain a variety of light colors we need through the filter device, in order to meet the needs for light color under different environments.
3) through the design and installation of optical fiber tail parts, lighting from the abstract transition become of visualizing. Fiber optic lighting gives light texture, the sense of space, even given the light of life and personality.
4) fiber optic lighting can achieve photoelectric separation, this is a qualitative leap, not only improves the safety performance, but also expansion of the application field。
5) lighting system of plastic optical fiber is soft light, no light pollution. Plastic optical fiber decorative lighting using filtered spectra way of changing the light source emitting light colors, through the optical fiber transmission, color is more soft and pure, give people the visual effect is very prominent。
6) General light source includes not only visible light, but also includes the infrared and ultraviolet.
We need to avoid the infrared and ultraviolet In some special occasions, for example: cultural relics, such as lighting. As the range of low loss window of plastic optical fiber in the visible spectrum, infrared and ultraviolet transmittance is very low, in addition the special treatment of the source machine，so the light emitted from the optical fiber is no infrared and ultraviolet luminescence.From the characteristic about fiber optic lighting, now and then have a look of the characteristics of LED.LED (Light Emitting Diode) is a semiconductor that can transform electric energy into visible light of the, it has changed the principle of tungsten filament lamp light and energy-saving light of tricolor lighting, while the use of electroluminescence. It has the following characteristics:
1) voltage： LED using low voltage power supply, power supply voltage between 6-24V, according to the different products vary, so it is a kind of safer power supply than the use of high voltage power supply.
2) efficiency： Energy consumption reduced by 80% than the incandescent lamp of the same brightness.
3) applicability：Each element of LED is small 3-5mm square, so the devices can be prepared into various shapes, and is suitable for variable environment.
4) stability：100000 hours，light attenuation for the initial 50%。
5) response time：The response time of the incandescent lamp is in milliseconds, response time of LED lamp for ns level.
6) To the pollution of the environment: no harmful metal mercury.
7) color：adjustment the current can change color, light-emitting diodes by chemical modification methods, adjustment the band structure and band gap to draw a lighting of red yellow green blue color light orange。
8) LED the price is expensive, compared with incandescent lamps, a few LED prices can and an incandescent lamp for the same price, but usually each signal lamp by 300 ~ 500 diodes form 。Due to the unique advantages of fiber optic lighting and LED bulbs, they have been widely used in various occasions, and in the promotion of constantly。