Why should choose a constant current power supply for the LED driver?
The LED is a light-emitting diode, and its characteristic curve is basically the same as that of a normal diode. When the applied voltage reaches the diode conduction voltage, the slight change of the applied voltage can cause a great change in the diode current. The constant current is used to ensure that the current […]
Characteristics of LISUN GDJS series High and Low Temperature Humidity Chamber
LISUN GDJS series High and Low Temperature Humidity Chamber is according to IEC60068-2-1 (GB/T2423.1) and IEC60068-2-2 (GB/T2423.2). It is used to test the CFL/LED which meets IES LM-80-08, electricity products, electronic components, material and so on. There is some other manufacturers in China also produce High and Low Temperature Humidity Chamber, and our equipment is mainly different from the […]
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 […]
Mexico – Installation and training for Goniophotometer
LISUN engineer visit a famous local laboratory in Mexico this time. In the last quarter, they purchased a set of LSG-5000SCCD Moving Detector Goniospectroradiometer from our company. By comparison, our equipment is the most cost-effective among the same quality equipment. Besides, we can also provide on-site installation and training services. After the customer place the […]
Waterproof Test Equipment Analysis in China Market
Waterproof grade reflects the ability of moisture-proof of products. Especially for outdoor activities, it is unavoidable to be in the harsh environment of high humidity. The sealing and water-proof ability of the instrument is very important to ensure the safe of operation and life of the instrument. At present, there are many manufacturers producing waterproofing […]
LED packaging principle
LED package is mainly to provide a platform for LED chips, so that LED chips have better performance of light, electricity and heat. Good packaging can make LEDs have better luminous efficiency and good heat dissipation environment, and good heat dissipation environment can enhance LEDs. The service life. LED packaging technology is mainly built […]
The difference between Integrating Sphere Test System and Goniophotometer
In optical testing, the measurement of luminous flux and color temperature are essential. There are two test equipment for the measurement: Integrating Sphere Testing System and Goniophotometer. Here we give you a brief introduction to the difference of these two test system:In optical testing, the measurement of luminous flux and color temperature are essential. There […]
3M Integrating Sphere Test Results Comparison
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. […]
Development of OLED Equipment Manufacturing Technology
Development of OLED Equipment Manufacturing Technology OLED (Organic Light Emitting Display) is a new generation of flat panel display technology after LCD, LED, CRT and PDP (Plasma Display Panel). It has significant new industry characteristics. OLED is a new type of pure solid (CRT and PDP), which is a new type of pure solid (and […]
Five kinds of LED Efficiency
Compare LED efficiency and life, the conception of efficiency is more complex. Firstly, there are three kinds of general efficiency。 Firstly, for lamp beads, there are two concepts of efficiency: Lamp beads luminous efficiency, how much light can be issued every 1W input power. This efficiency is the indicator to measure the light efficiency of […]
How to predict the life of LED?
In general, LED can be used for more than 50000 hours, and some manufacturers are promoting their LED to operate for about 100000 hours. The main problem in this area is that LED is not simply no longer operational. Its rated service life can not be calculated by traditional lamps and lanterns. In fact, when […]
The difference between main optical names of LED
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 […]
Color difference SDCM
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 […]
Space Color Distribution Measurement
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 […]
ISO 17025
ISO 17025 ISO17025 is the international standard for laboratory accreditation services; the latest version is released in May, 2005. The full name of ISO/IEC17025:2005-5-15 is Accreditation Criteria for the Competence of Testing and Calibration Laboratories. ISO17025 standard is the laboratory management standard formulated by the international Standardization Organization ISO/CASCO (Conformity Assessment Committee). Internationally the organization […]
ISO 17025
ISO 17025 ISO17025 is the international standard for laboratory accreditation services; the latest version is released in May, 2005. The full name of ISO/IEC17025:2005-5-15 is Accreditation Criteria for the Competence of Testing and Calibration Laboratories. ISO17025 standard is the laboratory management standard formulated by the international Standardization Organization ISO/CASCO (Conformity Assessment Committee). Internationally the organization […]
Introduction of Conducted Immunity Testing
Introduction of Conducted Immunity Testing This paper is a brief introduction and description for conducted immunity testing which based on IEC 61000-4-4 fast transient burst test, IEC 61000-4-5 lightning surge test, IEC 61000-4-11 voltage cycle drop test and IEC 61000-4-12 ring wave test. IEC 61000-4-4 establishes a common and reproducible reference for evaluating the immunity […]
Five kinds of LED Efficiency
Five kinds of LED Efficiency Compare LED efficiency and life, the conception of efficiency is more complex. Firstly, there are three kinds of general efficiency, please check the Diagram 1. Luminous Efficiency(lm/W) Conversion Efficiency lamp beads Connect lamp beads to DC power source directly, the rate of lamp beads flux and consumption power Connect lamp […]
What is the difference between IEC/ EN 60825-1 and IEC/ EN 62471?
What is the difference between IEC/ EN 60825-1 and IEC/ EN 62471? IEC 60825-1: 2007 is a standard issued by the European Union, applicable to safety of laser products emitting laser radiation in the wavelength range 180 nm to 1 mm. Its scope of application would be only applied to LASER products after September […]
LED Luminescent Spectrum
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.
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.
Brief introduction of CE certificates
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
LED Plant Lighting Lamp
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.
LISUN engineers do installation & training in Turkey
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: Figure 1: The LSG-1800B High […]
How to Measure the Immunity to the Electrical Fast Transient disturbance？
EFT is short for Electrical Fast Transient, which refers that the burst has specific duration (defined as 15 ms) and specific pulse period, and the single impulse from burst has specific repetition period, voltage peak, rise time and pulse width. The duration of burst is 15 ms, the pulse interval is 300ms, width of single […]
LISUN Exhibition Notice: October 2017 Hong Kong International Lighting Fair
LISUN Exhibition Notice: October 2017 Hong Kong International Lighting Fair HKTDC Hong Kong International Lighting Fair (Autumn Edition) 2017, organized by the Hong Kong Trade Development Council at the Hong Kong Convention and Exhibition Centre (HKCEC) from 27–30 Oct 2017, brings together state-of-the-art technology and the latest design trends in lighting. More than 2,660 exhibitors […]
The Summarize of Luminous Intensity Distribution Test
The Summarize of Luminous Intensity Distribution Test For lighting purpose, the luminaries playing a important role. A good lighting design is achieved by the choice of appropriate luminaires. The nature of the light emitted by the lamp and light control depend on the type of light source, the lamp reflection and the transmitting system and […]
IEC 61000-4-2 ESD Discharge Immunity Test
The International Electrotechnical Commission (IEC) has issued IEC 61000-4-2 Ed. 2.0 (2008-12) entitled “Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement techniques – Electrostatic discharge immunity test.” This standard relates to the immunity requirements and test methods for electrical and electronic equipment subjected to static electricity discharges, from operators directly, or from personnel to […]
