super bright led light bulbs and led flood light

First, what is the LED lamps for flood light?
LED lamps for flood light (LED Downlight) also known as the spotlight, projection lamps, spotlights, etc., mainly used to make the use of architectural lighting, as well as commercial space lighting decorative ingredients heavier, its appearance round party, generally have to consider the heat of reasons, therefore, its shape and Spotlights still have some differences.

Second, LED Floodlight features:

Common market, LED (super bright led light bulbs) Spotlights basically is the choice of 1W high power LED (each LED component with a high luminous efficiency made by the PMMA lens, its main function is the secondary distribution of the LED light, which is two optical), there are a few companies because of the heat if handled well, the choice of 3W or higher power LED. Cast lighting, buildings and other lighting suitable for large occasions.

Third, what is the LED flood lights  (super bright led light bulbs) ?

LED floodlight  (super bright led light bulbs) is a point light source of an exposure evenly in all directions, the irradiated area can be adjusted in the scene in the performance of a regular octahedron icon. The floodlight is in effect, making them the most widely used light sources, standard floodlights used to illuminate the entire scene. Floodlights can be applied to the scene to produce good results. The floodlight is the most widely used in the renderings, a light source, the scene with floodlights coordinating role, to the birth of the good results. Uniformly in all directions from a specific point in the irradiated object, use it to simulate light bulbs and candles are best. Floodlights can be placed anywhere in the scene. For example, it can be placed outside the camera range, or within the objects. Remote access to many different colors of floodlights in the scene is very common. These floodlights will be dark projection and mixing in the model. Floodlights illuminated area is relatively large, so the irradiation effect of the floodlights is very easy to predict, and this light there are many secondary uses, such as floodlights placed in position near the surface is the surface on to produce a bright light.

Fourth, the floodlight features:
The floodlight is uniformly in all directions from a specific point in the irradiated object, use it to simulate light bulbs and candles are best. Floodlights can be placed anywhere in the scene. For example, it can be placed outside the camera range, or within the objects. Remote access to many different colors of floodlights in the scene is very common. These floodlights will be dark projection and mixing in the model. Floodlights illuminated area is relatively large, so the irradiation effect of the floodlights is very easy to predict, and this light there are many secondary uses, such as floodlights placed in position near the surface is the surface on to produce a bright light.

super high power led in low temperature

1, What is the low temperature lighting?
Low temperature lighting refers to the use of artificial light source to light, the ambient temperature below 5 ° C venues, such as refrigerators, freezers, refrigerators, cryogenic plants, outdoor lighting. The low-temperature lighting to fluorescent-based, and now the LED street light (super high power led) source in the low-temperature lighting place.

2, the fluorescent lamps used in low lighting
Although the fluorescent lamp in a conventional room temperature, the luminous efficiency up to 90lm / W regarded as a high-efficiency light source, but when entering the low illumination environment, whether it is the luminous efficiency, illumination or aesthetic design shows more disadvantages. Even though some manufacturers have introduced a dedicated low temperature fluorescent lamps, to solve the problem of the luminous efficiency, but still can not take into account the illumination and aesthetic requirements. And the price is very expensive. At low temperatures, ordinary fluorescent light-emitting efficiency and even to be halved, and life will be shortened. Even without considering the nonuniform illumination of fluorescent lamps at low temperatures, but also consider the fluorescent light color and color rendering the problem of inadequate, because it can not show the best colors of the goods, can not achieve the purpose of attracting consumers .

3, LED Products used in several major advantages of low temperature lighting
Compared to CCFL fluorescent lamp cold light source, LED  (super high power led) used in low temperature lighting, or has a special advantage. First, LED, even at low temperatures of minus 40 degrees Celsius, can achieve instant start and requires no special circuit or programming. LED luminous efficiency is almost unaffected in the low temperature and may even be better than the normal environment. The three LED is a point light source, with a small, point to the characteristics of the optical arrangement in accordance with the design requirements for refrigerated cabinets, display and other places. And the LED can provide sufficient uniform illumination better to see the product label. Fourth, the LED light color, color temperature, color rendering of the variability can be based on different lighting requirements for different products, select the appropriate LED light source, to achieve the purpose of attracting consumers. Is the difference between LED and CCFL power supply before CCFL must first after a buck DC / DC converter, it will wear out the 10% electricity, wear out 25% of electricity through the Inverter, and finally to Fluorescent tube of power about only 70%. But the LED Lights just after the LED  (super high power led)  Driver will be able to direct transmission of power, so that the efficiency of the transformer circuit to up to 90%, with a larger energy-saving advantage.

super led bulbs in led application

In order to solve the LED Lights heat dissipation problems, the future may be largely vertical structure of the LED structure, promote the technical development of the LED industry. I believe we all are heard, the following only from the technical surface are described, for information on the vertical structure of LED (super led bulbs) technology.

We know that the LED chip (super led bulbs) has two basic structure of the horizontal structure (Lateral) and the vertical structure (Vertical). The horizontal structure of the LED chip, the two electrodes on the same side of the LED chip, the current limit in the n-and p-type layer in the lateral flow, ranging from distance. The two electrodes of the vertical structure of the LED chips on both sides of the LED epitaxial layer, respectively, due to graphical electrode and the p-type cladding layer as the second electrode, the current almost all vertical flow through the LED epitaxial layer, very little lateral flow current can improve the current distribution of the planar structure the problem, improve the luminous efficiency can also solve P shading to enhance the LED light-emitting area.

We start to understand under the vertical structure of the LED manufacturing technology and the basic methods:

Manufacturing vertical structure LED chip technology, there are three main ways:
The growth of GaN films, the use of silicon carbide substrate, the advantage is in the same operating current conditions, the light fades, long life, the shortcomings of the silicon substrate absorbance.
Second, the use of chip bonding and peeling technology manufacturing. The advantage is that the light fades, long life, the deficiencies to be the surface of the LED in order to improve the luminous efficiency.
Is heterogeneous substrates such as silicon substrate GaN LED (super led bulbs)  epitaxial layer, the advantage of good heat dissipation and easy processing.

There are two basic ways: Peel the growth substrate, and stripped the growth substrate to create vertical structure LED chip. Which the growth of GaAs growth substrate on the vertical structure of GaP based LED chips have two structures:
Do not peel the conductive GaAs growth substrate: the stacked conductive DBR reflection layer on the conductive GaAs growth substrate, the growth of GaP based LED epitaxial layer on the reflective layer of conductive DBR.
Stripped GaAs growth substrate: Cascading reflective layer on the GaP based LED epitaxial layer bonded to a conductive support substrate, stripping the GaAs substrate. Conductive support substrate, the substrate of gallium arsenide, gallium phosphide substrate, the silicon substrate, metal and alloy.

In addition, the vertical GaN-based LED Grow Lights grown on silicon, there are two structures:
Stripped silicon growth substrates: metal reflective layer stacked on a conductive silicon growth substrate or conductive DBR reflection layer, the growth of GaN-based LED epitaxial layer on the reflective layer in the metal reflective layer or conductive DBR.
Stripping the silicon growth substrate: cascading metal reflective layer on the GaN-based LED epitaxial layer on the metal reflective layer bonded conductive support substrate, stripping the silicon growth substrate.
A brief description of manufacturing a vertical GaN-based LED process: reflective layer stacked on the reflective layer on the GaN-based LED epitaxial layer bonding the conductive support substrate, stripping the sapphire growth substrate. Conductive support substrate including metal and alloy substrate, the silicon substrate.

The GaP-based LEDs, GaN-based LED and ZnO-based LED of this type of through-hole vertical structure of LED compared to traditional structures LED has a large advantage, in particular in:
1, the vertical structure LEDs of all colors: red LED, green LED, blue LED and ultraviolet light the LED can be made through-hole vertical structure LEDs have great application market.
2, all of the manufacturing process in the chip (wafer) level.
3, no need to play the gold wire with the outside world power is linked through-hole vertical structure LED chip package thickness decreased. Therefore, can be used in the manufacture of ultra-thin devices, such as backlight.

supernova led grow light review in signal lights

LED STREET LIGHT (supernova led grow light review) is a field light source, its light-emitting principle is a PN junction with a positive voltage at both ends of Hole in the P region to the N region. As the minority carrier and majority carrier compound to release energy, part of the energy into heat, the other part of the energy into light.

LED Lights (supernova led grow light review)  luminous color in the matrix and the infiltration of miscellaneous materials, in addition to white light are basically pure monochromatic light, light color, easy to control, it can be widely used in traffic lights, hand signal lamp display screen and so on. Traditional railway handheld lights ordinary incandescent bulbs or inflatable incandescent light bulbs as a light source, a red signal, green signal, the yellow signal generated by the red, green, yellow polycarbonate filter, on the one hand, in the polycarbonate added to the molding process, the toner amount is difficult to accurately control, leading to the resulting color is not pure, on the other hand polycarbonate in the long-term use, in particular, will degrade in sunlight yellow, affect the color displayed. And incandescent bulbs are only a dozen hours of service life, change frequently, continuous working time of more than 10 hours not required, the lighting is also heavier to carry the inconvenience.

There are many manufacturers to use red, green, yellow LED signal light, but also there are some manufacturers use multiple ultra bright white LED as white light white light, however due to the low luminous efficiency, low power, enough illumination therefore only be used as a signal can not play the role of task lighting.

LED light  (supernova led grow light review) efficiency with incandescent similar, and increase the scope of the change in color, it has become the basis of the signal light source, while its short response time, low fever, low energy consumption and long life, maintenance costs and low advantage, immediately causes the LED signal lights have a wide range of applications. With the continuous improvement of the optical design, LED luminous efficiency will continue to improve, the number of signal lights use LED tube now down to 100 pieces from the beginning of the four or five hundred, or even dozens of stars.

suppliers of led lights with Solar lawn

Solar lawn lamp solar cells energy to carry out the work, when the daytime sunlight on the solar cell, light energy into electrical energy stored in the batteries from the battery at night, as the lawn of LED (light emitting diode ) to provide power. Its advantages for safety, energy, convenience, and environmental protection. Apply to the residential community green beautification lighting decorations, park lawn beautification embellishment.

LED solar lawn structure:

By the solar modules (photovoltaic panels), ultra-bright LED lights (suppliers of led lights), maintenance-free rechargeable battery, automatic control circuit, lamps and other components.

LED solar lawn lamp system consists of:
Solar lawn boost IC can automatically switch to charge and discharge behavior, when daytime solar charging panel sensor to the sun, the automatic switch to turn off the lights into the state of charge, when darkness fell, the solar charging panels induction less than the sun, and automatically switch open the light to enter the state of battery discharge. Solar lawn boost IC, the output voltage of 1.5 volt rechargeable battery up to 3.6 volts.

LED solar lawn light source advantages:

Most lawn use LED  (suppliers of led lights) as a light source, LED, long life, can reach more than 100,000 hours, low operating voltage, very suitable for application in solar lawn. LED technology has experienced a key breakthrough, and its properties in the past five years has greatly improved its cost performance has greatly improved. In addition, LED  (suppliers of led lights) low voltage DC power supply, the light source control costs low, so that adjustment of light and shade, and frequently switches are possible, and will not have a negative impact on the performance of the LED  (suppliers of led lights). You can also easily control the color, change the distribution of light to generate dynamic mirage, so it is especially suitable for solar lawn.

Unique advantages of solar lawn lamp, solar lawn light and power system design, have developed rapidly in recent years. Lawn small power, mainly decorative purposes, applicable to high mobility, circuit laying difficulty, high water requirements venue. These make many unprecedented advantages of solar powered lawn.

sylvania led flood lights for sports using

The LED screen has become a modern major sports venues, essential facilities, major sporting events with a large number of LED screen (sylvania led flood lights) is indispensable equipment. The Coliseum display system to be able to clear, timely and accurately display the information of the sports competitions, and multimedia technology to show the game live, express and create a tense, warm atmosphere of competition. Require a system with simple and clear, accurate and efficient, easy to operate man-machine interface, support for multi-sport races projects, in line with the requirements of various sports competition rules, easy to maintain and upgrade.

The big screen screen is generally divided into the lattice and the timing of two parts, computer network control system for data processing, and control large-screen display, network systems and broadcast television systems to provide real-time data; special Judges access to all kinds of sports competitions basic score information infrastructure.

From their point of view can be divided into two categories, first, full-color LED Lightsscreen (sylvania led flood lights) for the scene in the game play the game (including the highlights of the stadium), or slow-motion replay and live a wonderful close-up lens, or use 3D animated performance of the tournament and a tournament.

The other is the timing scoring screen, it connected with the game time scoring, player player of the competition results and related information from the sense of the game, timing, scoring screen is more important, some venues may not large video screen, but can not for the timing scoring screen. Timing and scoring screen, the key is real-time accurate and clear, vivid and more expressive (eg, animation, etc.) and as far as possible on this basis. The scoring screen to display text or text plus graphics animation player game scores, data, or other information. Its color to monochrome, multicolor or full color.

It should be noted that the gymnasium electronic display system is a set of game design, and scoring display graphics, banners, video, audio, multimedia player and athlete, sports team background information management as one of the Information Management Centre, in order to be effective to achieve the above, the use of computer network systems as electronic display system hardware and software platforms, electronic screen, the referee seats, game timer, mounted as a network terminal in a LAN, in order to take full advantage of the network platform to reach the information shared management, the control mode is simple, easy system expansion and maintenance. Plus on the Stadium brighter ambient light, viewing distance, viewing angle is relatively large, the specifications of the LED STREET LIGHTs screen (sylvania led flood lights)  brightness according to the situation to be determined.

t12 led tube parameters

1. forward operating current If:
It refers to the normal light of the light emitting diode forward current value. Should be selected in the actual use of IF in 0.6 IFm below.

2. forward operating voltage of the VF (t12 led tube) :
The operating voltage is given in the parameter list in a given forward current. Generally measured at IF = 20mA. Light-emitting diode forward voltage VF 1.4 ~~ 3V. VF will drop in outside temperature.

3. V-I characteristics:
The relationship between voltage and current of the light-emitting diodes, the forward voltage is less than a certain value (called the threshold), the current is very small, non-luminous. When the voltage exceeds a certain value, the forward current with voltage is quickly increased, light.

4. Luminous intensity:
Luminous intensity of light emitting diodes are usually fingering line (cylindrical LED luminous intensity on its axis) direction. In the direction of radiation intensity (1/683) W / sr, the luminous one candela (symbol cd). General LED Lights (t12 led tube) luminous intensity is small, so commonly candlelight luminous intensity (candler mcd) units.

5. LED emitting angle:
-90 ° - +90 °

6. Spectral half width Δλ:
It indicates that the spectral purity of the light emitting tube.

7. half-value angle θ1 / 2 and perspectives:
θ1 / 2 is the angle between the luminous intensity value of the axial intensity value half of the direction of the light-emitting axial (normal).

8. full shape:
LED light-emitting solid angle conversion point of view, also called the plane angle.

9 perspective:
Refers to the maximum angle of LED light (t12 led tube) , according to the different perspective and different applications, also known as light intensity angle.

10. half-width:
The angle of the method to between 0 ° and the maximum luminous intensity value / 2. Strictly speaking, is the maximum luminous intensity value and the maximum luminous intensity values ​​/ 2 corresponds to the angle. LED Flood light packaging technology lead to the intensity value is not the law of the maximum light-emitting angle to 0 °, the introduction of the deviation angle refers to the point of view and method of the maximum luminous intensity corresponding to the angle between 0 °.

11. Maximum forward DC current IFm:
Allow plus the largest positive DC current. Than this value can damage the diode.

12. maximum reverse voltage VRm:
Allowed plus the maximum reverse voltage. Exceeds this value, the light emitting diode may be breakdown.

13. working environment topm:
The light emitting diode to a working ambient temperature range. Below or above this temperature range, light emitting diodes will not work properly, the efficiency is greatly reduced.

14. allow power Pm:
Allow the addition of the LED at both ends of a positive DC voltage and the flow through the maximum of its current product. Exceeds this value, the LED heat, damage.

t4 led tube and led down lights

Although the price factor constraints widely promote the use of high power LED, high reliability, high power LED, significant savings in future maintenance and replacement costs. Colorful, and other sources can not achieve this effect. Easy to control, digital control technology, to achieve dynamic lighting effects. LED Downlight is embedded into the ceiling light shooting style lighting. Its biggest feature is the ability to maintain the overall unity and perfection of the architectural decoration, lighting settings destruction of the perfect unity of the ceiling art. It uses high power LED (t4 led tube) as light source, the visual effects of soft, uniform. LED is the future of green lighting products. Furthermore, LED have the advantages of energy-saving plays an increasingly important role in the development trend of the downlight light.

High-power LED Downlight in the early input costs to be higher than traditional lighting, but after prolonged use, the consumption of the total cost will be lower than traditional lamps. Therefore, using high-power LED Downlight in significantly superior to the traditional incandescent light. And because of the high-power LED constant current drive, no flicker, long working environment eye fatigue. High-power LED is characterized by:

1 less power consumption, high power LED (t4 led tube) : light efficiency 65Lm / W of LED is more than equal to the brightness of incandescent power consumption savings of 80%.

2 long life, high power LED: LED life up to 50000h, 24 hours of continuous light available to seven years.

3 high power LED response speed approaching nanoseconds, the dynamic of brightness and color easy to control, to achieve the dynamic change of the digital control of color.

4 high-power LED design: buildings can be a good match to achieve the effect I saw the light but not light.

5 high-power LED clean and green: no toxic metals mercury, infrared and ultraviolet radiation.

Color: different wavelengths produce different colored light, bright and saturated, no filter, the formation of red, green, and blue control is available in different colors, and can achieve the effect of full-color, gradient, and a variety of colors.

High-power LED  (t4 led tube) to replace the incandescent light source showed the advantages of energy saving and long life incandescent and some other traditional light sources in many technical aspects of room for improvement is very small, the LED lamps to replace or replacement of existing lighting halogen bulbs in the downlights, light bulbs, gas discharge, incandescent light bulbs, luminous efficiency of LED downlights improve the efficiency of traditional lamps, but, due to the higher initial purchase cost, compared with fluorescent lamps, energy saving lamps, the energy saving effect is not very clear.

t5 high bay fixture LED metal package

Common substrate types of rigid printed circuit boards (PCB), high thermal conductivity coefficient of aluminum plate, ceramic substrates, soft printed circuit boards, metal composite materials. Low-power LED Lights package with PCB version of the ordinary for the electronics industry to meet the demand, but more than more than 0.5W LED packaging (t5 high bay fixture) are mostly switched to the metal lines and ceramic high heat dissipation substrate, mainly due to the cooling of the substrate LED life The performance has a direct impact on the package substrate is a very important component in the design of high brightness LED products application.

In the process of the general electricity into light, nearly 80% turn to the heat.  We rely on the heat sink for cooling. In fact, a lot of heat in so small space does not burn particles, but it makes the light more and more weak, which is commonly referred to as the light fades. Only the heat out fast, the light fades before the smaller.

The thermal expansion and dimensional stability of three of the application advantages of LED Tubes components (t5 high bay fixture)  listed below:

1, heat
At present, a lot of double sided, multilayer density, power, heat dissipation is difficult. Conventional PCB substrates such as FR4, CEM3 are poor conductor of heat insulation layer, the heat does not go out. Electronic equipment does not rule out local heating, resulting in the high-temperature failure of electronic components, metal-based printed circuit board can solve this thermal problem.

2, the thermal expansion
Thermal expansion and contraction is the common nature of the material, the different substances CTE (Coefficient of thermal expansion) coefficient of thermal expansion is different. The PCB is resin + reinforced materials (such as fiberglass) + complexes of copper foil. XY axis direction of the board, the PCB coefficient of thermal expansion (CTE) of 13 to 18 PPM / ℃, 80 to 90PPM / ° C in the plate thickness Z-axis direction, the CTE of copper of as 16.8PPM / ℃. Sheet of ceramic chip carrier CTE of as 6PPM / ℃, PCB plated hole wall and connected to the insulated wall in the Z-axis CTE is a big difference, the heat generated can not be immediately removed, thermal expansion and contraction so that the through holes cracking disconnect, such machinery and equipment is not reliable.

SMT (surface mount technology) to make this issue more prominent, the problem must be solved. Surface mount interconnect is achieved through the direct connection of the surface of the solder joint, the CTE of the ceramic chip carrier 6, while the FR4 substrate in the XY CTE of 13 to 18, therefore, mount connector solder joints due to different CTE long  (t5 high bay fixture) withstand the stress can lead to fatigue fracture.

3, the dimensional stability

Metal based PCB, apparently size than the insulating material PCB is much more stable. Printed circuit board of aluminum, aluminum sandwich panel, heated from 30 ℃ to 140 to 150 ° C, the dimensional changes of 2.5 to 3.0%. The metal base circuit board with excellent thermal conductivity, good machining performance and strength, good electromagnetic shielding performance, good magnetic performance. Product design follows the semiconductor conduction mechanism, and therefore not only the thermal conductivity of the metal circuit board (metal PCB): aluminum plate, copper substrate has good thermal conductivity, heat dissipation. And the green environmental protection, both to solve the heat problem to solve environmental problems.

t5 high bay fixtures drivers

LED backlighting in portable products, the status can not be shaken, even of large-size LCD backlight LED Lights began to challenge the CCFL (cold cathode fluorescent lamp), the mainstream position; in the lighting field, LED as the semiconductor lighting the most critical components with energy saving, environmental protection, long life, maintenance-free, and many other sought after by the market. The drive (t5 high bay fixtures) circuit is an important part of the LED Panel (light emitting diodes) products, in terms of lighting, backlight or display board areas, the choice of the drive circuit technology architecture should be a specific application to match.

LED light-emitting principle  (t5 high bay fixtures) is that it ends with a positive voltage, the semiconductor minority carrier and majority carrier complex, and release excess energy, causing the emission of photons. The main function of the LED driver circuit to convert AC voltage constant current power supply, in accordance with the requirements of the LED devices to match with the voltage and current of the LED. LED driver circuit to meet the safety requirements, and other basic functions should have two aspects:

First, as far as possible to maintain constant current characteristic, especially in the power supply voltage of ± 15% change should still be able to maintain the output current changes in the range of ± 10%. Using LED  (t5 high bay fixtures) as a display or lighting or backlighting, the need for constant current drive, mainly due to:
(1) to avoid the drive current exceeds the maximum rating, affect its reliability.
(2) to obtain the desired brightness requirements, and to ensure that each LED brightness, color consistency.

Second, the drive circuit should be kept lower power consumption, so as to enable the efficiency of the LED Street Light system to maintain at a high level.
PWM (Pulse Width Modulation) technology is a traditional way of dimming it using a simple digital pulse repeatedly switch the LED driver, the system need only provide a wide, narrow different digital pulse, you can simply change the output current, so as to adjust the brightness of the LED. The advantages of the technology is able to provide high-quality white light, and the application of simple, high efficiency, but a fatal flaw is prone to electromagnetic interference, and sometimes will produce the human ear can hear the noise.