LED fluorescent lamp installation is relatively simple, it is divided into two kinds: power supply built-in and external. When the power supply built-in LED fluorescent lamp installation, the original fluorescent lamp will be replaced with LED fluorescent lamp, and the ballast and glow generator will be removed, so that 220V AC power can be directly added to both ends of the LED fluorescent lamp. The LED fluorescent lamp with external power supply is usually equipped with a special lamp holder, which can be used if the original lamp is replaced.
LED fluorescent lamp can save more than 80% electricity, and its life is more than 10 times that of ordinary lamp. It is almost maintenance-free. There is no need to replace lamp, ballast and glow generator frequently. The cost saved in about half a year can be replaced back. Green environment-friendly semiconductor light source was soft light, pure spectrum, is conducive to the protection of workers'vision and health. 6000K cold light source gives people a sense of visual cooling, helps to concentrate and improve efficiency.
   
Luminescence principle:
The terminal voltage of PN junction forms a certain barrier. When the forward bias voltage is applied, the barrier decreases and most carriers in P and N regions diffuse to each other. Because the electron mobility is much larger than the hole mobility, a large number of electrons will diffuse into the P region, forming the injection of a few carriers into the P region. These electrons recombine with the holes in valence bands, and the energy obtained by recombination is released in the form of light energy. This is the principle of PN junction luminescence.
. LED fluorescent lamp
 Luminous efficiency:
Luminous efficiency generally known as the external quantum efficiency of a component, it is the product of the internal quantum efficiency of the component and the extraction efficiency of the component. Internal quantities of so-called components
 
Sanfeng LED fluorescent lamp
Sub-efficiency, in fact, is the electro-optic conversion efficiency of the module itself, which is mainly related to the characteristics of the module itself (such as energy band, defects, impurities) and the barrier crystal composition and structure of the module. The removal efficiency of components refers to the photons generated inside the components. After the absorption, refraction and reflection of the module itself, the number of photons actually measured outside the module. Therefore, the factors affecting the removal efficiency include the absorption of the component material itself, the geometric structure of the component, the refractive index difference of the component and the packaging material, and the scattering characteristics of the component structure. The product of the internal quantum efficiency and the removal efficiency of the module is the luminous effect of the whole module, that is, the external quantum efficiency of the module. Early component development focused on improving the internal quantum efficiency by improving the quality of barrier crystals and changing the structure of barrier crystals. It is not easy to convert electric energy into thermal energy, which indirectly improves the luminous efficiency of LED. Thus, about 70% of theoretical internal quantum efficiency can be obtained, but such internal quantum efficiency has almost reached the theoretical limit. In such a situation, it is impossible to improve the total light quantity of the module by improving the internal quantum efficiency of the module, so improving the removal efficiency of the module becomes an important research topic. At present, the main methods are: grain shape change - TIP structure, surface roughening technology. .
Electrical characteristics:..
The load characteristics of current-controlled devices are similar to the UI curve of PN junction. The minimal change of the forward on-voltage will cause a great change of the forward current (exponential level). The reverse leakage current is very small and there is a reverse breakdown voltage. In actual use, should choose. The forward voltage of LED decreases with the increase of temperature and has negative temperature coefficient. LED consumes power, part of which is converted into light energy, which is what we need. The rest is converted into heat, which increases the junction temperature.
Optical properties:
LED provides a large half width with monochrome light. Since the energy gap of semiconductor decreases with the increase of temperature, the peak wavelength of emission increases with the increase of temperature. That is, the spectrum is red shifted and the temperature coefficient is + 2~3A/. The luminance L of the LED is approximately proportional to the forward current: K is the proportional coefficient. With the increase of current, the luminous brightness increases approximately. In addition, the luminous brightness is also related to the ambient temperature. When the ambient temperature is high, the composite efficiency decreases and the luminous intensity decreases.
 
Thermal characteristics:
At low current, the temperature rise of LED is not obvious. If the ambient temperature is high, the main wavelength of the LED will shift red, the brightness will decrease, and the uniformity and consistency of the luminescence will become worse. Especially, the temperature rise of lattice and large display screen has more significant influence on the reliability and stability of LED. So heat dissipation design is very important.
Life:
Long-term work of LED will cause light aging, especially for high-power LED, the problem of light aging is more serious.In measuring the life of the LED, it is not enough to use the damage of the lamp as the end point of the life of the LED. It is more meaningful to use the percentage of the light attenuation of the LED to determine the life of the LED, such as 35%.
Characteristics of LED fluorescent lamp
LED fluorescent lamp is characterized by high quality, durability and energy saving. Its projection angle can be adjusted in a wide range. The brightness of 15W fluorescent lamp is equivalent to that of ordinary 40W fluorescent lamp. It has high temperature resistance, moisture-proof and water-proof, and anti-leakage. Use voltage: 110V, 220V optional, cover can choose glass or PC material. The lamp head is the same as the ordinary fluorescent lamp.
LED fluorescent lamp uses the latest LED light source technology, digital appearance design and energy saving up to 70%. 12W LED fluorescent lamp has the same intensity as 40W fluorescent lamp, and its lifetime is more than 10 times longer than that of ordinary lamp. It is almost maintenance-free and does not need to change lamp tubes, ballasts and starters frequently. Green environmental protection semiconductor light source, soft light, pure spectrum, is conducive to user's visual protection and health. 6000K cold light source gives people a refreshing sense of vision. Humanized illumination difference design is more conducive to concentrating and improving efficiency.

1. Applicability is strong, adaptability and reliability are improved in indoor and outdoor harsh environments.
 
2. Rich colors: It is composed of three primary colors (red, green and blue) display unit box, which enables the electronic screen to display dynamic images with rich colors, high saturation, high resolution and high display frequency.
 
3. High brightness: Using ultra-high brightness LED, the long-distance visibility under strong sunlight is still clear.
 
4. Good effect: Using non-linear correction technology, the image is clearer and the sense of hierarchy is stronger.
 
5. Strong reliability: using static scanning technology and modular design technology, higher reliability and stability
 
6. Diversification of display modes: support multiple display modes
 
Characteristics of ordinary fluorescent lamps
There is a filament at each end of the ordinary fluorescent lamp. The tube is filled with trace argon and thin mercury vapor. The inner wall of the tube is coated with fluorescent powder. When the gas between the two filaments conducts electricity, it emits ultraviolet rays, which makes the fluorescent powder emit soft visible light.The working characteristics of ordinary fluorescent lamp: when the lamp is ignited, a high voltage is needed, and only a small current is allowed to pass when the normal light is emitted. At this time, the voltage at both ends of the lamp is lower than the power supply voltage.
The ordinary fluorescent lamp tube is equipped with filaments at both ends. The inner wall of the glass tube is coated with a uniform thin fluorescent powder. After the tube is pumped into a vacuum of 10-3-10-4 mm mercury column, a small amount of inert gas is filled into the tube, and a small amount of liquid mercury is injected at the same time. Inductive ballast is an inductance coil with iron core. The nature of inductance is that when the current in the coil changes, it will cause the change of magnetic flux in the coil, thus generating inductive electromotive force, whose direction is opposite to the direction of current, thus hindering the change of current. The glow generator plays a switching role in the circuit. It is composed of a neon discharge tube and a capacitor in parallel. The function of the capacitor is to eliminate the electromagnetic interference to the power supply and form a vibrating loop with the ballast to increase the amplitude of the starting pulse voltage. An electrode in the discharge tube is made up of bimetal sheets, which are heated by neon bubbles. When the bimetal sheets are opened and closed, the current of the inductor ballast suddenly changes and high voltage pulses are generated and applied to both ends of the lamp tube.
　
By comparing the properties of LED fluorescent lamp with those of ordinary fluorescent lamp, the conclusion is drawn as follows:
Compared with ordinary fluorescent lamp, LED fluorescent lamp has the following advantages:
Energy-saving, long life, good applicability, because the size of a single LED is small, can be made into any shape. Short response time, environmental protection, no harmful metals, waste easy to recycle, Brilliant color, pure luminous color, narrow spectral range, and can be mixed into seven colors or white light through red, green and blue tricolor.
Advantage:
1. Environmental protection lamps to protect the earth
Traditional fluorescent lamps contain a large amount of mercury vapor, which will evaporate into the atmosphere if broken. But LED fluorescent lamps do not use mercury at all, and LED products do not contain lead, which plays a protective role in the environment. LED fluorescent lamps are recognized as green lighting in the 21st century.
2. Efficient conversion to reduce fever
Traditional lamps produce a lot of heat energy, while LED lamps convert all electric energy into light energy, which will not cause waste of energy. And for documents, clothing will not fade.
3. Quiet and comfortable, no noise
LED lamps do not produce noise and are the best choice for the use of precision electronic instruments. Suitable for libraries, offices and other occasions.
4. Soft light to protect eyes
Traditional fluorescent lamps use alternating current, so they produce 100-120 strobes per second. LED lamp is a direct conversion of alternating current to direct current. It will not produce flicker phenomenon and protect eyes.
5. No ultraviolet rays, no mosquitoes
LED lamps do not produce ultraviolet light, so they do not have many mosquitoes around the lamp source like traditional lamps. The interior will be cleaner and cleaner.
6. Voltage Adjustable to 80V-245V
Traditional fluorescent lamps are lit by the high voltage released by the rectifier, but cannot be lit when the voltage decreases. LED lamps can be lit up within a certain range of voltage, and can also adjust the brightness.
　　
7. Save energy and live longer
LED fluorescent lamp consumes less than one third of the power of traditional fluorescent lamp, and its life is 10 times longer than that of traditional fluorescent lamp. It can be used for a long time without replacement, thus reducing labor costs. It is more suitable for difficult to replace.
8. Strong and reliable, long-term use.
The LED lamp body itself uses epoxy resin instead of traditional glass, which is more solid and reliable. Even if the LED is smashed on the floor, it will not be easily damaged and can be safely used.
9. Compared with ordinary fluorescent lamp, LED fluorescent lamp does not need ballast, starter and stroboscopic. 10 Maintenance-free, frequent switches will not cause any damage.
11. Safe and stable quality can withstand 4 kV high voltage and low heat dissipation. It can work at low temperature-30 C and 55 C.
12. It will not affect the surrounding environment. No ultraviolet and infrared rays, no harmful materials, such as mercury, eye protection, and no noise.
13. It has good vibration resistance and is easy to transport.
 
 
Composition and appearance of materials
1. The LED fluorescent lamp consists of several ultra-bright low-power LEDs and a PC shell with high transmittance.
2. There are two types of LED fluorescent lamps: straw hat and sticker beads.
3. There are two kinds of LED fluorescent lamp housing:
One kind: transparent PC shell, high transmittance, can see inside the beads;
The other is a translucent sanding case with soft light.
4. The working voltage of LED fluorescent lamp is wide and can be used from 80V to 245V.
5. LED fluorescent lamps can be made into red, yellow, blue, green, white and warm white colors.
Basic specification parameters
8w:30*600mm 174 beads 600 LM
12w:30*1168mm 276 beads 1000 LM
15w:30*1198 mm 342 beads 1200 LM
Scope of application:
Indoor lighting for office buildings, factories, shopping malls, schools and homes