LED Tester | Christmas Light Tester - LISUN

The difference between main optical names of LED LED luminaires are this kind of device which can transmit, distribute, and change the light distribution of light source. They are becoming the main products of a new generation of lighting market with its high efficiency, energy saving, safety, long service life, compact, and other technical characteristics. They effectively promote energy-saving environmental protection industry of high-speed development. The usual parameters of light which associate with photometry are light intensity, luminous flux, illuminance and brightness. Although these four quantities are related, they are different and can not be confused. Just as the physical quantity like pressure, gravity, pressure, quality, they represent different parameters and effects. 1. Light Intensity( I, Intensity) Unit Candela (CD), this is the inherent properties of point source. It is to represent the convergence ability of light. Definition: The luminous flux which light source ...

How to Solve the Stroboscopic Problem of LED Lighting? “Bright blind” in life is an exaggerated description of some impact incidents, but if it is used for the LED lighting industry, then it is the quality problems of LED lamp itself. And "strobe" is likely the initiator to lead to "blind". Many people are not very clear about the concept of strobe, and even don’t care about its harm. Regarding the hazard of strobe, experts have given the conclusion. A lot of LED lights on the market use the pulse power supply, their cost is relatively cheap, at the same time conducive to adjust the brightness, and also extend the working life of lamp. However, it is not a continuous light, but flicker in a very high speed, we can not see with naked eye. Only our brain and retina can detect the strobe. This kind of flicker may cause headaches, decreased attention and vision loss. Energy Bureau staff told the media that the government should exert more attention to this problem, impr...

“Bright blind” in life is an exaggerated description of some impact incidents, but if it is used for the LED lighting industry, then it is the quality problems of LED lamp itself. And "strobe" is likely the initiator to lead to "blind". Many people are not very clear about the concept of strobe, and even don’t care about its harm. Regarding the hazard of strobe, experts have given the conclusion. A lot of LED lights on the market use the pulse power supply, their cost is relatively cheap, at the same time conducive to adjust the brightness, and also extend the working life of lamp. However, it is not a continuous light, but flicker in a very high speed, we can not see with naked eye. Only our brain and retina can detect the strobe. This kind of flicker may cause headaches, decreased attention and vision loss. Energy Bureau staff told the media that the government should exert more attention to this problem, improve the laws and regulations, so that make unqualified ...

How to Test the Junction Temperature of LED? We know that the life of LED is closely related to its junction temperature. The key to prolonging its life is to reduce its junction temperature. And the key to reduce the junction temperature is to have a good heat sink that able to exhaust the heat generated by LED in time. So, how to measure the junction temperature of LED? Junction temperature seems to be a temperature measurement problem, but the junction temperature need to measure is in the internal of LED. Can’t we measure its temperature with a thermometer or a thermocouple into the PN junction. Of course, its shell temperature can be measured with thermocouple, and then its junction temperature can be calculated according to the thermal resistance Rjc (junction to the shell). But things become more complicated after installing the radiator. Because usually LED is welded to the aluminum substrate, and the aluminum substrate is installed on the radiator. If you can only measure...

As we known the quality of LED lighting products depend on two points: One is LED chip(light source); Second is LED power driver. In the practice, there only have few company can provide qualified LED chip such as PHILIPS, OSRAM and CREE in the market. Generally, the LED chip have very small change to get quality problem, but we heard many news about low quality LED lighting products was found and caused big losses to customers because of un-qualified LED driver. As considering the importance of LED driver, this article will discuss some technical introduction and measurement technology. There have some necessary test items of LED Power Driver Tester   such as Crest Factor, Effective Power, Reactive Power, Apparent Power, Power Factor, Voltage/Current (RMS value, Average value) and THD harmonic parameters etc. In the practice measurement, lots of people found it have big difference between get from LED driver tester and multimeter, and this difference focus on Voltage/current rms,...

Color difference SDCM Color difference is an important indicator of CFL color performance. Color difference is the difference between computer calculation forma and the target standard, calculated by single lighting source, the value is smaller, accuracy is higher. Please note, it only represents the compared color of a light source, it can not detect the deviation under different light sources. Generally speaking, color difference refers to the distance that the measurement value deviates from the target value, the difference between the light source spectrum and the standard spectrum. It needs provide the target value and calculation formula to know the measurement value of color difference. Standard spectrum changes with color temperature, the color difference is different for the same light source if the standard spectrum is different, but when test, general color photoelectric analysis system can automatically identify the color temperature range where the measured light source is...

Color difference SDCM  Color difference is an important indicator of CFL color performance. Color difference is the difference between computer calculation forma and the target standard, calculated by single lighting source, the value is smaller, accuracy is higher. Please note, it only represents the compared color of a light source, it can not detect the deviation under different light sources. Generally speaking, color difference refers to the distance that the measurement value deviates from the target value, the difference between the light source spectrum and the standard spectrum. It needs provide the target value and calculation formula to know the measurement value of color difference. Standard spectrum changes with color temperature, the color difference is different for the same light source if the standard spectrum is different, but when test, general color photoelectric analysis system can automatically identify the color temperature range where the measured light sour...

With the rapid development of LED lighting market, the competition becomes more and more intense. So more and more LED lighting manufacturers began to focus on the quality of their products in order to gain a greater share in the market. Thus, LED lighting test instruments became the indispensable equipment. On the LED test equipment, there are goniophotometer , integrating sphere , spectroradiometer , LED driver power tester , EMI & EMC test equipment , and IP waterproof , dustproof environmental test chamber and so on. And goniophotometer , integrating sphere and spectroradiometer is the most common and also basic equipment, mainly used to test the LED luminaires photometric, colorimetric and electrical performance, such as lumen (luminous flux), luminous intensity distribution, luminous efficiency, correlated color temperature, color rendering index, voltage, power and other basic parameters. However, due to the price of these equipment is not cheap and it requires a certain ...

Lisun engineers visited Barcelona recently, this visit was mainly to install the 3m Integrating Sphere Test System for the customer and provide training service. This customer compared the test results of Lisun’s 3m Integrating Sphere Test System with the test results of Holophane(HEL) and LIA Laboratories. This customer provided 4 samples to the third lab. Compared with LIA Laboratories, our tolerance are controlled within 5%: HAL – LED Highbay: 4.6% VMX LED Luminarie: 2.3% Corn Lamp: 2.5% Platek – Target Medium Prioette LED Luminaries: 0.5% [caption id="attachment_10185" align="alignnone" width="619"] The test report of Platek tested by Lisun 3m Integrating Sphere Test System[/caption] [caption id="attachment_10186" align="alignnone" width="449"] The test report of Platek tested by LIA Laboratories-1[/caption] [caption id="attachment_10187" align="alignnone" width="449"] The test report of ...

Space Color Distribution Measurement   Use Integrating Sphere Spectroradiometer System to test color parameters for light source and luminaries and use Goniophotometer System to test luminous intensity, which is the measurement for traditional light source and measurement.   Compare with traditional light source, the optoelectronic properties of LED light source are more complex, traditional light source measurement methods and instruments are unable to fully meet the needs of the market. With the development of technology, new light source has uneven spatial distribution, the international pays high attention to light source and luminaries color spatial distribution measurement recently. More and more lighting manufacturers have to measure the spatial distribution of color parameters.   Lisun LSG-1800BCCD/LSG-1700BCCD/LSG-1600BCCD High Precision Goniospectroradiometer is based on LSG-1800B/LSG-1700B/LSG-1600B with a high precision CCD spectroradiometer to test spatial C...

This is a big lighting company in Turkey. They purchase a set of LSG-1800BCCD High Precision Rotation Luminaire Goniospectroradiometer Rotation Luminaire Goniospectroradiometer, EMI-9KA EMI Receiver System and LMS-6000 Portable CCD Spectroradiometer from LISUN this time. They are satisfied with our service and said there would be other projects in the near future. Below is photos of the installation & training: [caption id="attachment_10165" align="alignnone" width="800"] Customer, LISUN engineer and the LSG-1800BCCD High Precision Rotation Luminaire Goniospectroradiometer[/caption] [caption id="attachment_10166" align="alignnone" width="800"] Customer, LISUN engineer and the LSG-1800BCCD High Precision Rotation Luminaire Goniospectroradiometer[/caption] [caption id="attachment_10167" align="alignnone" width="800"] Customer, LISUN engineer and the EMI-9KA EMI Receiver System[/caption] Ou...

Lisun engineer visited Brazil in May, 2018. This Brazil trip is mainly to visit our customer LABORATORIOS BRUCH LTDA . This customer is a research and development company, they are developing the lighting market in Brazil. They bought many LED Test Instruments this time. [caption id="attachment_10153" align="alignnone" width="800"] LSG-1700B High Precision Rotation Luminaries Goniophotometer [/caption] [caption id="attachment_10154" align="alignnone" width="800"] LPCE-2(LMS-9000B) High Precision Spectroradiometer Integrating Sphere Test System [/caption] [caption id="attachment_10156" align="alignnone" width="800"] KH3962 EMI Test System(Lisun New Model is EMI-9KB) [/caption] Lisun will provide more after sales installation and training service to our customers and return the love to our customers with the most reasonable price and the best quality service.