Industry Knowledge

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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

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

What are EMC tests?

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.   […]

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 […]

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 […]

Lisun New Product! – LED Aging Rack

Driver is the most important component of LED luminaire, its quality is directly related to the performance and quality of the luminaire. As the LED lighting manufacturers and importers’ production and procurement are in large quantities, the traditional LED driver tester has been unable to meet the demand. As per the requirement of customers, Lisun […]

How to choose Integrating Sphere to measuring different lamps

The Spectrometer & Integrating Sphere System or Photometer & Integrating Sphere System, there’s have two important parts: one is measuring and analysis; another is assistant part which providing testing environmental. Here we will discuss the assistant part, we knew that the integrating sphere spherical aggregates, the inner wall of integrating sphere is coated with a […]

How to choose Goniophotometer

The definition of goniophotometer is for measuring light lamps and light performance, that’s lamp light source luminosity, color values in different spatial directions distribution, and export to IES files applying on the lighting design software DiaLux. The CIE121-1996 and IES-LM-79-08 standard’s are mentioned the types of goniophotometer, the CIE121-1996 mentioned two type goniophotometer:: one is […]

Type A LED tube test

With LED development, the traditional fluorescent tubes in the market are gradually being replaced by LED tubes. Currently LED tubes can be divided into three categories: Type A tube: This lamp can replace the fluorescent tube directly without modification; Type B tube: The power supply of this lamp is built-in LED tube, which can connect […]

Glow wire test

Glow wire test is to test the stability of electrical and electronic products during working. And the hot wire itself is the resistance wire ring with fixed size. When doing test, the wire ring should be heated up to the specified temperature by electricity, so that the time when the top of the wire reached […]

LISUN engineer visit Peru to Install and Train the LSG-1800B Goniophotometer in May

LISUN engineer visited Peru customer in May, its really a pretty company, they bought a LSG-1800B Goniophotometer from LISUN, and we believe that we can achieve a long-term cooperation in the future. The first day our engineer arrived here, he came to the darkroom to install the equipment with the staff together. The second day, […]

Do you know IPX9K?

For IP grade test, we know the regular level IPX1~IPX8, today we will introduce the IPX9K grade test. In the Annex of standard IEC60529-2013 version, it introduces IPX9 High pressure and temperature water jet. Brief description: Protected against high pressure and temperature water jets. Definition: Water projected at high pressure and high temperature against the […]