LED Tester | Christmas Light Tester - LISUN

LED Luminescent Spectrum   Spectrum is the relative distribution of wavelength and light intensity. The spectrum of LED is generally monochromatic LED, such as blue LED with a peak wavelength of 470nm, with shorter peak wavelength ultraviolet area and with longer peak wavelength green areas as the determination limitation of light intensity. And the spectrum of incandescent lamp, its luminous intensity is widely distributed in the blue area 400nm to 700nm near infrared field, in the field of ultraviolet and infrared can also observe the luminous intensity. As for Fluorescent lamp, the part of combination usage's phosphor light wavelength is the peak of the spectrum. Compared with the ordinary red, green and blue LED spectral peak, the white LED spectrum is different. For example, there are two luminous intensity peaks in the area of blue and yellow, or in the blue field, yellow and red fields, there are three peaks, and even more. This is because the white LED white light is a comb...

Integrating Sphere Development   Integrating Sphere is used for flux measurement, which can make test result more reliable. Integrating Sphere can reduce the measurement error caused by the shape of light, divergence angle and responsiveness difference in different location on detector. Let us learn more details about the development of Integrating Sphere manufacture technology. Picture 1:Old Model Integrating Sphere Picture 1 is old model Integrating Sphere. The hemisphere manufacturing technology of this Integrating Sphere is surrounded by six iron sheets via angle iron, and then two hemispheres are connected by fixture. The bottom adopts adjustable foot to support and fix the whole sphere. Picture 2 Improved Model Integrating Sphere Picture 2 is the improved model integrating sphere. This integrating sphere specification makes no difference with old model. But the critical technologies are that hemisphere is disposable stamping by mould. Technology requirements are very high. Me...

Jacky Installation training in Poland   This Polish customer purchased a High & Low Temperature and Humidity Chamber , IK level Tester and Dustproof Testing Machine from LISUN this time. They are a relatively large lighting manufacturer. We arranged engineer to do installation and training for them when confirm that the customer received the goods. The customer is very satisfied with our service, and indicating that we are the most responsible Chinese manufacturer they have met and will continue cooperating with us in the future.   We share some photos here: [caption id="attachment_8795" align="alignnone" width="800"] Figure 1: Jacky (the right 2) with the client's photo[/caption]   [caption id="attachment_8797" align="alignnone" width="800"] Figure 2: The customer is installing the device[/caption] [caption id="attachment_8798" align="alignnone" width="800"] Figure 3: Customer are ...

Introduction of EMC Testing   EMC (Electro-Magnetic Compatibility) refers to the ability of a device or system to function in its electromagnetic environment and does not constitute an unacceptable electromagnetic disturbance to anything in that environment. EMC is an important indicator of product quality.   EMC tests include:   EMI (Electro-Magnetic Interference): Electromagnetic disturbance testing The purpose of this test is to detect the effects of electromagnetic radiation generated by electrical products on the human body, the public grid, and other electrical appliances that are working properly.   (2) EMS(Electro-Magnetic Susceptibility): Electromagnetic Immunity Test The purpose of this test is to detect electrical products whether can work stable and unaffected in the electromagnetic environment.   EMI tests include:   (1) Radiated disturbance test (RE) - Test standard: EN55022 (2) Conducted disturbance test (CE) - Test standard: ...

    Brief introduction of CE certificates   In recent years, the CE marks are more and more widely used in the market of European economic area (Member states of the European Union and the European Free Trade association, except Switzerland). More customs of different countries set out the requirements of CE certification for imported products. Exporter will be in trouble as well as unnecessary loss if their shipping goods don't have CE certified label. So, what is the importance of CE certification? What are the forms of CE certification so far? And what are the risks of products that has not been certified by CE?   The importance of CE certification   The CE mark on the packaging indicates that it meets the requirements of a series of European directives such as safety, sanitation, environmental protection and consumer protection. In the past, EC(European Community)countries require differently for import and sale of products. The goods which are produced acco...

Advantages and disadvantages for total flux test of Integrating Sphere System and Goniophotometer   According to IESNA-LM-79-80 , the total luminous flux (lumen) of SSL products shall be measured with an integrating sphere system or a goniophotometer. The method may be chosen depending on what other measurement quantities (color, intensity distribution) need to be measured, the size of SSL products, and other requirements.   The integrating sphere system is suited for total luminous flux and color measurement of integrated LED lamps and relatively small-size LED luminaires. The integrating sphere system has the advantage of fast measurement and does not require a dark room. Air movement is minimized and temperature within the sphere is not subject to the fluctuations potentially present in a temperature-controlled room. It should be noted that the heat from the SSL product mounted in or on the integrating sphere may accumulate to increase the ambient temperature of the product...

What are EMC tests?   With the widespread use of electrical and electronic equipment, the problem of electromagnetic disturbance has also brought electromagnetic pollution.   EMC(Electro Magnetic Compatibility) refers to the ability of a device or system to operate within its electromagnetic environment without incurring unacceptable electromagnetic interference to any device in its environment. EMC testing, one the one hand refers to the electromagnetic interference from the devices during normal operation in its environment cannot exceed a certain limit, on the other hand refers to the appliance has a degree of immunity to electromagnetic interference present in the environment. It divides broadly into emissions testing and susceptibility testing.   Electromagnetic Interference (EMI): RE (Radiated Emission): Test unintentional release of electromagnetic energy from an electronic device or apparatus. CE( Conducted Emission): Test the electromagnetic energy travelling ...

LISUN Engineer visit our Chile customer and do installation & training here in December 2017   The destination of this trip is Chile. LISUN engineer Jacky went there to do installation & training for our customer. This customer purchased a LSG-1700B Rotation Luminaire Goniophotometer (Big Size) from our company this time. This is a LED luminaries manufacturers, they heard of LISUN from their friends and contact us directly. And finally, they purchase a set of LSG-1700B Rotation Luminaire Goniophotometer (Big Size).   Finally, we share some photos here: [caption id="attachment_8708" align="alignnone" width="800"] Figure 1: LISUN engineer (The middle) and our client[/caption] [caption id="attachment_8709" align="alignnone" width="800"] Figure 2: The LSG-1700B Rotation Luminaire Goniophotometer (Big Size) has been installed[/caption]

Goniophotometer System Standard Operating Procedures   Goniophotometer is mainly used to measure the light performance of luminaries and light source, it mainly could measure the light intensity distribution curve, light intensity data, beam angle, total flux, luminaries efficiency, zonal luminaries flux, luminance distribution, coefficient of utilization, luminance limitation curves, maximum efficiency ratio of distance to height, equal illuminance diagram, effective average illuminance curve, spatial color distribution and average color parameters and so on. Lisun LSG-1800B is a high performance Goniophotometer. How to do standard operation for Goniophotometer? Firstly, it is preparation. Before operation, testers should detect whether the connection between signals lines, control lines and power lines of Goniophotometer different parts are normal. System rotation cabinet panel key switch, open the total power, and then press ”Motor” button to open the power of...

LED Plant Lighting Lamp Light environment is one of the indispensable and important physical environmental factors for plant growth and development. LED plant lighting lamp is a kind of artificial light source to meet plant photosynthesis light conditions. In the absence of sunlight, lamp can act as daylight. Plant growth lights play the function of environmental protection and energy conservation. LED plant lights provide photosynthesis light conditions, promote plant growth, short the time of plant bloom and bear fruit, improve production. It is an indispensable product for crops during modernization construction.   The wavelength types of LED plant lamps are rich, which is coincided with the spectral range of plant photosynthesis and photomorphogenesis. It can concentrate the light of a specific wavelength to irradiate the crop evenly. Not only it can regulate crop flowering and fruiting, but also it can control plant height and plant nutrients. System has less heat and less spa...

LISUN Engineer Stay in Turkey to do Installation & training in January 2017   In January 2017, LISUN attend the Istanbul Lighting Fair. And after that LISUN engineer come to our customers’ company to do installation and training and also visit some of our old customers here.   This customer purchased LPCE-3 Integrating Sphere & Spectroradiometer Compact LED Test System from LISUN this time. They choose LISUN because their friend company has the instruments from LISUN and the they works very well. Many thanks for our customer’s promotion for LISUN. We would continue to presenting more and more high quality products to our customers in the future!   Let's share some of the photos with you below: [caption id="attachment_8662" align="alignnone" width="800"] Figure 1: Photo of LISUN engineer (Second on the right) and our customer[/caption] [caption id="attachment_8663" align="alignnone" width="800"] Figure 2: the cu...

LISUN Engineer Stay in Turkey to do Installation & training in January 2017   In January 2017, LISUN attend the Istanbul Lighting Fair. And after that LISUN engineer come to our customers’ company to do installation and training and also visit some of our old customers here.   This customer purchased LPCE-3 Integrating Sphere & Spectroradiometer Compact LED Test System from LISUN this time. They choose LISUN because their friend company has the instruments from LISUN and the they works very well. Many thanks for our customer’s promotion for LISUN. We would continue to presenting more and more high quality products to our customers in the future!   Let's share some of the photos with you below: [caption id="attachment_8662" align="alignnone" width="800"] Figure 1: Photo of LISUN engineer (Second on the right) and our customer[/caption] [caption id="attachment_8663" align="alignnone" width="800"] Figure 2: the cu...

Installation & Training  in Brazil   After doing  install and traning for EVERLIGHT INDUSTRIA E COMERCIO LTDA, Lisun engineer visit local another customer Studio XXI Metalurgica Eirelli and also provide the customer with install and training, this time they purchased LSG-1700B  high precision rotating luminaire goniophotometer . The visit went off successfully, as was to have been expected. Besides, With tremendous technical strength, honest services, reasonable price and good reputation, we have got high praise from the customer. Before the ending of the visiting in company, the customer said that they would purchase LISUN instruments if they still have other need later. For this visiting in Brazil, it  is meaningful and happy for our engineer. The following is some install & training photos at customer side:   [caption id="attachment_8652" align="alignnone" width="600"] Figure 1: LSG-1700B high precision rotating luminaire goniophotometer[/capti...

Installation & Training in Brazil After doing install and traning for EVERLIGHT INDUSTRIA E COMERCIO LTDA, Lisun engineer visit local another customer Studio XXI Metalurgica Eirelli and also provide the customer with install and training, this time they purchased LSG-1700B high precision rotating luminaire goniophotometer. The visit went off successfully, as was to have been expected. Besides, With tremendous technical strength, honest services, reasonable price and good reputation, we have got high praise from the customer. Before the ending of the visiting in company, the customer said that they would purchase LISUN instruments if they still have other need later. For this visiting in Brazil, it is meaningful and happy for our engineer. The following is some install & training photos at customer side: [caption id="attachment_8652" align="alignnone" width="600"] Figure 1: LSG-1700B high precision rotating luminaire goniophotometer[/caption]

Installation & Training  in Brazil   After doing  install and traning for EVERLIGHT INDUSTRIA E COMERCIO LTDA, Lisun engineer visit local another customer Studio XXI Metalurgica Eirelli and also provide the customer with install and training, this time they purchased LSG-1700B  high precision rotating luminaire goniophotometer. The visit went off successfully, as was to have been expected. Besides, With tremendous technical strength, honest services, reasonable price and good reputation, we have got high praise from the customer. Before the ending of the visiting in company, the customer said that they would purchase LISUN instruments if they still have other need later. For this visiting in Brazil, it  is meaningful and happy for our engineer. The following is some install & training photos at customer side: [caption id="attachment_8652" align="alignnone" width="600"] Figure 1: LSG-1700B high precision rotating luminaire goniophotometer[/caption]

Moving Mirror Goniophotometer Introduction Lisun LSG-2000 Moving Mirror Goniophotometer System adapts the solution of rotating mirror in the center, it is widely applied in road lamp, room lamp, spot lights, stage lights, Mining lamp, Automobile lamp, traffic signal lamp and LED lamp etc. all kinds of luminaries for light distribution performance(light distribution curve) measurement, it can also test total flux, luminaries efficiency for all types of lighting sources. It can realize CIEA-α，CIEB-β，CIEC-γ measurement solution with different software. The test result can be directly used as the input data of the international lighting design software, and comply with the requirements of CIE, IESNA and other international and domestic standards.   Lisun LSG-2000 Moving Mirror Goniophotometer System can test spatial luminous intensity distribution, luminance intensity data, zonal luminance flux, luminance efficiency, coefficient of Utilization, luminance l...

IP Waterproof and Dustproof Rating Tes t   Purpose of the test: to assess the ability of the material to prevent solids and liquids from entering the external shell Detection range: electrical and electronic equipment, automotive aircraft and other parts   IP level (waterproof and dustproof) definition IP waterproof and dustproof, refers to the protection level of electrical equipment, in accordance with its ability of preventing external objects intrusion, waterproof, moisture-proof and dustproof characteristics to be graded. The external objects include tools, human fingers, etc. which are not accessible to the live parts of the lamp to avoid electric shock. IP protection level is composed of two figures, the first number represents the level of dustproof ability for lamps, and the ability of preventing foreign objects intrusion; the second number represents the level of anti moisture and water for lamps. The larger the number is, the higher the degree of protection is. For ...

High and low temperature test In natural environment, temperature and humidity are two indivisible natural factors. Due to different geographical locations in different regions, the temperature and humidity effects generated are also different. This test is used to confirm the products’ adaptability during storage, transportation and usage in the climate of some certain temperature and humidity. Severe levels depend on the high / low temperature, humidity and the time of exposure. High temperature test is introduced in detail: this test is used to determine the adaptability of the products to store, transport and use under the conditions of high temperature and climate. The severity of the test depends on the temperature of the high temperature and the duration of the exposure. Reference test standards: GB/T 2423.2, IEC 60068-2-2, IEIA 364, MIL-STD-810F and so on. Low Temperature Test: This test is used to confirm the products’ adaptability of storage, transportation and usa...

New Product - LMS-6000 Portable CCD Spectrometer In order to meet the demands of the lighting market for handle spectrometer, Lisun launches LMS-6000 Portable CCD Spectrometer recently. Compare with Lisun CHROMA-2 Pocket Chroma Meter, LMS-6000 is lighter and easy to carry. Of course, the price is more competitive. LMS-6000 can be inserted SD card to store data, which is easy to use.   Let us introduce LMS-6000 briefly. Spectral platform: telephoto asymmetrical crossed CT system. Wavelength range: 380~780nm(350~950nm), FWHM: 2nm, Spectral resolution: 0.2nm Sensor: CCD with 3648pix Integration time: 50μs~20000ms Stray light: <0.1% Illuminance range: 5~200000lx CCT range: 1000~100000K Color coordinates accuracy: ±0.001@standard light source A 2856K Zero calibration: automatically self calibration Test mode: single/continuous LCD screen: 5inch high definition IPS capacitive touch screen and resolution is up to 480*854 With 4000mAh rechar...

LISUN Engineer Continue to do Installation and Training in Turkey   LISUN engineer visit several customers in Turkey this time. And the customer we discussed today purchased a LSG-1700B Rotation Luminaire Goniophotometer (Big Size) from LISUN this time.   LISUN engineer stay 2 days in our customer’s company for the installation and training. The customer is enthusiasm, and they expressed satisfaction with our service finally. It’s a happy trip here. [caption id="attachment_8561" align="alignnone" width="800"] Figure 1: Group photo of the customer and LISUN engineer(The left)[/caption] [caption id="attachment_8562" align="alignnone" width="800"] Figure 2: Group photo of the customer and LISUN engineer(The right)[/caption] [caption id="attachment_8563" align="alignnone" width="800"] Figure 3: Customer are practicing the operation of LSG-1700B Rotation Luminaire[/caption] [caption id="attach...

Lisun Electronics Engineers went to Hungary to install Goniophotometer for our Hungary customer.   Zengővári Lighting Ltd has been manufacturing lighting products for 20 years in Hungary. In October 2012, Zengővári Lighting Ltd purchased Lisun Rotation Luminaire Goniophotometer (LSG-1800 ) for lamp testing. Our Engineers spent three days in providing installation and training service to customers. The first day, Zengővári engineers carefully reviewed the drawing provided by Lisun Enigneers, then they installed the test system, and calibrated and debugged the instruments in accordance with CIE standards. The next day, Zengővári staff from technical department together with Lisun Engineers used the calibrated system to test some lamp samples, and they found the test result was very close to the rated specifications. On the last day, Lisun Engineers gave a detail introduction and training for Zengővári staff about the basic knowledge a...

LISUN engineer visit Turkey to do installation & training   In February 2017, LISUN engineer visit Turkey to do installation & training for our customers. This customer is a famous lamp manufacturer in Turkey. They purchase a LSG-1950S Goniophotometer for Automotive and Traffic Signal Lamps and a XYL-VI Photometer and Colorimeter from LISUN this time. We share some photos below: [caption id="attachment_8540" align="alignnone" width="800"] Figure 1: The LSG-1950S Goniophotometer purchased by the customer[/caption] [caption id="attachment_8541" align="alignnone" width="449"] Figure 2: The XYL-VI Photometer and Colorimeter purchased by the customer[/caption]    

Moving Mirror Goniophotometer Introduction Lisun LSG-2000 Moving Mirror Goniophotometer System adapts the solution of rotating mirror in the center, it is widely applied in road lamp, room lamp, spot lights, stage lights, Mining lamp, Automobile lamp, traffic signal lamp and LED lamp etc. all kinds of luminaries for light distribution performance(light distribution curve) measurement, it can also test total flux, luminaries efficiency for all types of lighting sources. It can realize CIEA-α，CIEB-β，CIEC-γ measurement solution with different software. The test result can be directly used as the input data of the international lighting design software, and comply with the requirements of CIE, IESNA and other international and domestic standards.   Lisun LSG-2000 Moving Mirror Goniophotometer System can test spatial luminous intensity distribution, luminance intensity data, zonal luminance flux, luminance efficiency, coefficient of Utilization, luminance li...

LISUN engineers do installation & training in Turkey In September 2017, LISUN Engineers do installation and training for customers in Turkey. This customer purchased a LSG-1800B High Precision Rotation Luminaire Goniophotometer and a set of LPCE-2 Integrating Sphere & Spectroradiometer Test System from LISUN. Here we share some photos below: [caption id="attachment_8521" align="alignnone" width="800"] Figure 1: The LSG-1800B High Precision Rotation Luminaire Goniophotometer purchased by the customer[/caption] [caption id="attachment_8522" align="alignnone" width="800"] Figure 2: Customer, LISUN engineer and the LSG-1800B High Precision Rotation Luminaire Goniophotometer[/caption] [caption id="attachment_8523" align="alignnone" width="800"] Figure 3: Customer, LISUN engineer and the LPCE-2 Integrating Sphere & Spectroradiometer Test System[/caption] [caption id="attachment_8524...

LISUN engineer visit the United States to do installation & training in October 2017   At the end of October 2017, LISUN engineer Jacky once again set foot on the journey of installation & training for customers, and he arrived the Phoenix Sky Harbor International Airport Guide (PHX) on October 27. This customer purchased a LSG-1800BCCD High Precision Rotation Luminaire Goniospectroradiometer from LISUN this time.   About LSG-1800BCCD: LSG-1800BCCD Goniospectroradiometer is high precision automatic goniophotometric instrument for luminous intensity distribution measurements with facility for turning the light source. The LSG-1800BCCD can do the spatial CCT test when do the intensity distribution test. It is for industrial laboratory measurements the photometric data of luminaires such as LED luminaries, HID lamps, fluorescent lamps and so on. You can learn more at: http://www.lisungroup.com/product-id-383.html   Here we share some photos: [caption id="attachment_8...

I P Waterproof and Dustproof Rating T est Purpose of the test: to assess the ability of the material to prevent solids and liquids from entering the external shell Detection range: electrical and electronic equipment, automotive aircraft and other parts IP level (waterproof and dustproof) definition IP waterproof and dustproof, refers to the protection level of electrical equipment, in accordance with its ability of preventing external objects intrusion, waterproof, moisture-proof and dustproof characteristics to be graded. The external objects include tools, human fingers, etc. which are not accessible to the live parts of the lamp to avoid electric shock. IP protection level is composed of two figures, the first number represents the level of dustproof ability for lamps, and the ability of preventing foreign objects intrusion; the second number represents the level of anti moisture and water for lamps. The larger the number is, the higher the degree of protection is. For example, IPX...

LISUN Engineer visit Brazil to do installation & Training In September 2017   At the beginning of September 2017, LISUN engineer fly to Brazil immediately after the installation and training in the United States. LISUN Engineer stayed in Brazil for nearly half a month this time to do installation and training and meet several customers who are interested in LISUN products at the same time.   This article is for one of our customers in Brazil, the customer is a famous local lighting manufacturer, they build a new laboratory recently, and purchase some LED test equipments from LISUN. Such as LSG-1800BCCD High Precision Rotation Luminaire Goniospectroradiometer , LPCE-3 Integrating Sphere & Spectroradiometer Compact LED Testing System, JL3456 Waterproof Test system and IK07-10 IK Level Tester.   LISUN engineer have designed the darkroom of the LSG-1800BCCD and operating room of JL-3456 waterproof test system for our customer. LISUN engineer spent 4 days here, the...

LISUN engineer visit Kenya to do installation & training in AUGUST 2017   LISUN engineer visit Kenya to do installation and training for customer here in early AUGUST 2017 The customer purchased the LPCE-2 High Precision Spectroradiometer & Integral Sphere Test System (1.5m Constant Integrating Sphere) from LISUN this time.   Our engineers go to do installation and training all over the world almost every month, our customers are very satisfied with our service, which also contribute to more and more customers, and more and more business volume. We will provide customers with better products and better service in the future.   Here share some photos you:   [caption id="attachment_8429" align="alignnone" width="800"] Picture 1: LISUN engineer (Right second) with the customer[/caption] [caption id="attachment_8430" align="alignnone" width="800"] Picture 2: LISUN engineer are training for customer[/caption] [caption id...

Integrating Sphere Work Principle If the total flux of light enter integrating sphere is Φ, irradiate on the inner wall area S3 of the integrating sphere. The light diffuse on the surface of the inner wall several times. Examine the illumination of the inner wall at any point M. Since the light entering the integrating sphere directly illuminates at S3, one part of the light diffused by each point on the S3 will irradiate on the observation M point directly, the illuminance of all these light illuminated to point M is called the direct illumination, which is denoted by E0. In addition, there are some light diffused from S3 to each point on the inner wall of the integrating sphere by multiple diffuse reflections and then reach to point M, the sum illuminance of this part light is called multiple diffuse reflection illuminance, which is denoted by E∑. Thus, the illuminance E of the observation point M is the sum of the two parts of the illuminance: E=E0+E∑     ...

  Shanghai Lisun (India) New Delhi Office Exhibition 2016 New Delhi LED Lighting Exhibition   In October 5th-7th 2016, New Delhi LED lighting exhibition held in New Delhi, the capital of India. As one of India's largest LED lighting exhibition, New Delhi LED lighting exhibition displays different lighting solutions, including LED chips, LED lamps, LED package, intelligent building lighting design and LED test equipment, etc..   In order to do better serve for customers in India, Lisun group India Office jointly participate participate in this exhibition and display the latest LED test technology and test equipment to customers. Lisun group have been in India market for 9 years, and have been cooperating with too many local customer. There are many new and old customers to visit our booth during the exhibition, and we negotiate a new cooperation with our colleagues in India. Lisun group focus on the LED test instrument began in 2003, we have cooperated with many famous lig...

In early August 2017, LISUN engineer Fred go abroad again to installation and training, the first stop is Russia . This customer purchased one LSG-1800X Rotation Luminaire Goniophotometer and a set of LPCE-2 High Precision Spectroradiometer & Integrating Sphere Compact Test System from LISUN this time.   Customer’s engineer is also very young and he can speak English fluently, the communication is very smooth. The installation & training lasted 3 days here.   Finally, we share some photos here: [caption id="attachment_8384" align="alignnone" width="800"] Picture 1: LISUN engineer, customer engineer and LPCE-2 Spectroradiometer & Integrating Sphere Compact Test System[/caption] Picture 1: LISUN engineer, customer engineer and LSG-1800X Gpniophotometer [caption id="attachment_8385" align="alignnone" width="800"] Picture 2: LISUN engineer, customer engineer and LSG-1800X Gpniophotometer[/caption]

LISUN engineer visit Spain to do installation & training   LISUN engineer visited customer in Spain in July 2017, and completed the installation and training tasks. This customer is a big lighting factory, they purchased a set of LMS-1900B Near Field Moving Detector Goniophotometer & IS-3.0 Integrating Sphere Test System from LISUN.   Usually, there are 2 hemispheres, customers should install them to one sphere. But this installation task is more complex. The volume of the ball is relatively large, and there is not simply two hemispheres here. They use two days to install the Integrating Sphere. The third day began the product training and operational exercises.   Finally, share some photos here: [caption id="attachment_8376" align="alignnone" width="820"] Picture 1: LISUN engineer is guiding to install the integrating sphere[/caption] [caption id="attachment_8377" align="alignnone" width="820"] Picture 2: LISUN engi...