A detailed LED fluorescent lamp related knowledge - (AddTime - 2013-01-23)

200W led Flood light is to use super bright LED white as light source, shell for acrylic/aluminium alloy. Housing available PC control, high temperature resistant up to 135 degrees. 200W led Flood light and the traditional fluorescent lamp in appearance size on the diameter, length sixty cm and 120 cm, 150 cm three, its power were 10 w, 16 w and twenty w, and twenty w traditional fluorescent lamp (ballast) the actual power consumption is about 53 w, w and traditional fluorescent lamp (ballast) the actual power of 68 w.

200W led Flood light members &people waiting

[1] definition:
10 w 200W led Flood light brightness than the traditional and w fluorescent lamp and bright, 16w 200W led Flood light than traditional 64 w fluorescent lamp and light, 200W led Flood light brightness especially more soft more make people easy to connect to teach. Life in the 50000-80000 hours power supply voltage for AC85V - 260 v (ac), no electric fluorescent starter and ballast, start quickly, power is small, no stroboscopic, not easy to visual fatigue. It not only super energy saving more environmental protection. Is the national green energy-saving lighting engineering focus on the development of one of the products, is now replace traditional fluorescent lamp main products.
200W led Flood light installation is simple, it points power inner and outer two kinds, power built-in 200W led Flood light installation, will be removed and replaced by the original fluorescent lamp, 200W led Flood light and ballast and electric fluorescent starter take out, let 220 v ac mains directly added to the LED fluorescent tube ends can be. Supply the outer 200W led Flood light general equipped with a special lamp, replace the original can be used.
200W led Flood light power saving as much as 80% above, life for ordinary lamp ten times as many as in the above, is almost free maintenance, there is no often should change fluorescent tubes, ballast, electric fluorescent starter, about half a year down the savings can change back to the cost. Green environmental protection semiconductor electric light source, the light is downy, spectrum pure, be helpful for workers eyesight protection and health, 6000 k cold light source to person visual sense of cool and refreshing feeling, help to concentrate, improve efficiency.

Luminous principle:
PN junction terminal constitute a certain barrier, when add forward bias voltage time base down, P and N area the majority carrier diffusion to the other party. Due to the electron mobility than hole mobility, so there will be a large number of electronic to P area diffusion, constitute to P area minority carrier injection. These electronic and price of the belt hole composite, compound for the form of energy to light energy release out. This is the principle of p-n junction luminescence.

Luminous efficiency:
Commonly referred to as the component of the external quantum efficiency, which is the component of the internal quantum efficiency and component extraction efficiency of the product. The so-called component internal quantum efficiency, in fact, is the component itself of electro-optical conversion efficiency, the main components and characteristics of itself (such as component material band, defect, impurities), component base crystal composition and structure, etc. And component extraction efficiency, is the component internally generated photons, after the absorption of the component itself, refraction, reflection, the actual component can be used to measure the outside the photons. Therefore, on extraction efficiency factors including the components of material itself, the absorption of component geometry structure, components and packaging materials of refractive index difference and component structure of the scattering characteristics, etc. And the component of the internal quantum efficiency and component extraction efficiency of the product, is the whole assembly glow effect, also is the component of the external quantum efficiency.
Early component development focused on improving the internal quantum efficiency, the main way is by improving the quality of the crystal base and change the base of the crystal structure, electrical energy is converted into heat energy, and then improve the indirect LED luminous efficiency, thus can obtain 70% internal quantum efficiency theory, but such internal quantum efficiency is almost close to the theoretical limit. In such a situation, light on improving the internal quantum efficiency of the components is impossible to improve the component of total quantity of light, and therefore improve the component extraction efficiency has become an important research topic. The present method is mainly to: grain appearance change - TIP structure, surface roughening technology.

Electrical properties:
Current control type device, load characteristic similar p-n junction UI curve, is guide through the voltage of the minimal change will cause forward current of the great changes (index level), the reverse leakage current is small, have reverse breakdown voltage. In actual use, should choose. LED forward voltage with temperature rise and smaller, with negative temperature coefficient. LED consumed power, part is changed into light energy, this is what we need. Rest is transformed into heat and high temperature. Send out quantity of heat (power) can be expressed as.

Optical properties:
LED offer is half width big monochromatic light, because of semiconductor energy gap decreases with temperature rise, so its emission peak wavelength with temperature rise and growth, the spectral red shift, temperature coefficient is + 2 ~ 3 a /. LED luminous intensity L and forward current approximation in proportion:, K for scale factor. Current increases, the luminous intensity also approximate increase. Other luminous intensity and environment temperature related, environment temperature high, composite efficiency drops, luminous intensity decreases.

Thermal properties:
Small electric shed, LED temperature rise is not obvious. If the environment temperature is higher, LED the dominant wavelength will red shift, brightness will decline, luminescence uniformity, consistency variation. Especially lattice, big screen to the rise of temperature of the LED reliability, stability influence is more significant. So thermal design is the key.

Life:
The long time work LED light failure caused by aging, especially for high power LED light for failure problem is more serious. In the measure of the LED life, with only a light damage to the end of life as the LED is not enough, should be LED light attenuation percentage to provisions of the life of the LED, such as 35%, so that more meaningful.
200W led Flood light characteristics
200W led Flood light with high quality, durable, energy saving as the main characteristics, the projection Angle adjustment range is big, the brightness of the 15 w as common and w fluorescent lamp, resistance to high temperature, moistureproof waterproof, prevent leakage. The use of voltage are: 110 v, 220 v optional, cover optional glass or PC material. Lamp holder and common fluorescent lamp as.
200W led Flood light using the latest LED light source technology, digital appearance design, power saving is as high as 70% above, 12 w LED solar light is equivalent to the strong and w fluorescent tubes 200W led Flood light life for ordinary lamp ten times more than, almost no maintenance, do not need to replace frequently lamp, ballast, starter. Green environmental protection semiconductor electric light source, the light is downy, spectrum pure, be helpful for the user's eyesight protection and health. 6000 k cold light source to person visual sense of cool and refreshing feeling, humanized illumination differences design, the more help to concentrate, improve efficiency.
1, applicability, in all kinds of environments inside and outside the adaptability and reliability are improved
2, color is rich, the three colors (red, green, blue) display unit housing composition, make the electronic screen realize display color is rich, high saturation, high resolution, display frequency high dynamic image
3, high brightness, high brightness LED light, the sun under remote still clearly visible 4, good effect: the nonlinear correction technology, image more clear, administrative levels feels stronger
5, reliability: the static scanning technology and modular design technology, higher reliability and stability
6, the display mode diversification: support for a variety of display mode.
Common fluorescent lamp characteristics
Common fluorescent lamp at each end a filament, tube filled with a trace of argon and the thin mercury vapor lamp on the wall coated with fluorescent powder, two filament between the gas when conducting a ultraviolet ray, make a fluorescent powder soft visible light.
Common fluorescent lamp work features: tubes start up need a high voltage, normal light at the only allowed through the small current, when both ends of the tube voltage is lower than the power supply voltage.
Common fluorescent tube ends with filament, the glass tube wall coated with a layer of uniform thin fluorescent powder, tube being pumped into vacuum 10-3-10-4 mm hg later, filling a small amount of inert gas, but also into the trace of liquid silver. Inductance ballast is a core inductance coil, inductance is the nature of the current when the coil is changed, then the coil will cause magnetic through changes, thus induced electromotive force, its direction and current direction instead, thus hindering the current changes.
Electric fluorescent starter in the circuit in the switch function, it consists of a neon discharge tube with a capacitor in parallel to the role of the capacity for the elimination of power of the electromagnetic interference and ballast formation vibration soup loop, increase the start pulse voltage amplitude. Discharge pipe to an electrode with double metal composition, the use of NaiPao discharge heating, make the bimetallic strip in the open and closed, cause inductance ballast current mutation and produce high voltage pulse added to the tube ends.
When common fluorescent lamp access circuit later, electric fluorescent starter two electrodes began to glow discharge, make the bimetallic strip heating expansion and static contact polar contact, and power supply, ballast, filament and electric fluorescent starter constitute a closed loop, current makes the filament preheating, when the heating time 1-3 seconds, electric fluorescent starter two electrodes glow discharge out, then the bimetallic strip cooling and static contact polar disconnect, when two electrode open instant, the current in the circuit suddenly disappeared, so they create a high voltage pulse, it and power superposition, added to the tube ends, make the tube inside the inert gas ionization and cause arc discharge, in normal luminous process, ballast self-induction also plays the role of the current in the circuit stability.
Through the 200W led Flood light attribute characteristics and common fluorescent lamp attribute characteristics contrast conclusion:
200W led Flood light and common fluorescent lamp is has advantages as follows:
Energy saving, long life, good applicability, for single LED volume small, can be made into any shape, response time is short, environmental protection, no harmful metal, waste recycling, easy flowery colour, luminous color is pure, spectral range is narrow, and through the red, green, blue three colors mixed color into colorful or white light.

200W led Flood light and common fluorescent lamp is 200W led Flood light have shortcomings are as follows: the price is expensive, at present can generally do efficiency of light and the light efficiency theory also has the very big disparity, at present can do life and life, the theory also has the very big disparity. There are still certain calorific value, light failure can also be greatly reduced.