Standard for testing ultraviolet intensity of UV (ultraviolet) lamps used for disinfection
The principle of ultraviolet disinfection is to use ultraviolet radiation to cause photolysis and denaturation of bacteria proteins, and the amino acids, nucleic acids and enzymes of bacteria are destroyed and died. At the same time, when the ultraviolet rays pass through the air, the oxygen in the air is ionized to generate ozone, which […]
Uses of UV lamps and test methods for UV lamps
Ultraviolet lamps can be used for ultraviolet sterilization, excitation fluorescence (fluorescence microscope, banknote detection), trapping and killing insects, and printing. Curing three-dimensional parts of different shapes and sizes, angles and bends, edges and bumps requires light to be projected onto all surfaces and should have sufficient energy. Generally, the lamp is composed of a lamp […]
Fixture startup, rise time and flicker test
In recent years, the LED market has been expanding, which is attributed to the unique characteristics of LED solid-state lighting products, such as good luminous efficiency, long service life and high reliability .Therefore, LED solid-state lighting products are increasingly favored by the market and consumers. But at the same time, because of the fast response […]
The Lighting Product EMC Problem and Testing Technology
LEDs and LED luminaires with high light efficiency, longer lifetime, better energy saving and environmental friendly advantages to achieve top position on the lighting industry, like indoor and outdoor lighting application. With the introduction of various national support policies, there appeared many LED lighting products manufacturer, but the quality of LED lighting products is not […]
IEC 60529（GB4208-2008）IP Protection Grade Waterproof and Dustproof test
IEC 60529 IP code is a coding system to indicate the degrees of protection provided by an enclosure against access to hazardous parts, ingress of solid foreign objects, ingress of water and to give additional information in connection with such protection IP code includes 4 digits, like IP23CH. IP short for ingress protection; numeral 2 […]
What are PAR, PPF, PPFD and How to do the measurement
When LEDs arrived on the market, their tremendous efficiency and money saving potential changed the playing field and lumens, lux and candela finally became obsolete metrics for determining light requirements for plants. Recently, people began referring to PAR, PPF and PPFD as ways to measure light in photosynthetics lighting applications. The purpose of this article […]
The differences of the test result between LISUN WT2080 LED Power Driver Tester and multimeter test LED power driver
Some customers suspect the accuracy of the WT2080 because there is some differences of the test result between LISUN WT2080 LED Power Driver Tester and multimeter when testing LED power driver. In fact, the test results are different because the test principle is different: the WT2080 test result is the real effective value (RMS), the […]
The LED Drive Power Supply
The LED power supply is a power converter that converts the power supply into a specific voltage and current to drive the LED light, because no power supply can directly supply the LED light. Therefore, in order to use LED as lighting source, the problem of power supply transformation should be solved first. LED is […]
The classification of EMC
Introduction Electromagnetic Compatibility EMC refers to the ability of a device or system to function properly in its electromagnetic environment and does not constitute an electromagnetic disturbance to anything in the environment. Sensor electromagnetic compatibility refers to the adaptability of the sensor in the electromagnetic environment, maintaining its inherent performance and the ability to perform specified […]
The differences of the test result between LISUN WT2080 LED Power Driver Tester and multimeter test LED power driver
Some customers suspect the accuracy of the WT2080 because there is some differences of the test result between LISUN WT2080 LED Power Driver Tester and multimeter when testing LED power driver. In fact, the test results are different because the test principle is different: the WT2080 test result is the real effective value (RMS), the multimeter test result is the average […]
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.
