E-Catalog Download

Lisun Group issued the 2017 Version E-Catalog. Lisun Group is lead in CFL and LED Test Instruments. The main products application is following: LED Luminaires and LED Power Driver Test Solution Goniophotometer System: LSG-5000, LSG-1800B or LSG-1700B Spectroradiometer & Integrating [...]

LED Luminaires Basic Parameters Collection

LED manufacturers must learn some basic luminaries’ parameters such as brightness, spectrum and color temperature and so on as standard to identify pros and cons. We will introduce following LED lighting products normal parameters and tell you how to [...]

The Status of Integrating Sphere in China Market

IES LM-79-08 “Electrical and Photometric Measurement of Solid-State Lighting Products” as the exclusive international standard for measuring the total luminous flux, electrical power, luminous intensity distribution and correlated color temperature (CCT), color rendering index (CRI) and other colorimetric parameters [...]

Electrostatic Measurement Application in Lighting Industry

Electrostatic discharge may occur from personnel to object or object to object, and it will cause the failure of electric and electronic devices. So, the test of electrostatic discharge is widely applied in the worldwide. The ESD Simulator (ESD [...]

Hongkong Lighting Fair 2016 – Lisun Group as an Exhibitor

At the end of October 2016, Lisun Electronics (Shanghai) Co., Ltd attended lighting fair in as in previous years. Hongkong International Lighting Fair has been an ideal platform for LED industry to promote the latest lighting products. With the [...]

Three Loop Antennas

During electromagnetic radiation test, three loop antennas are often used. Lisun three loop antenna VVLA-30M is a standard measurement antenna according to CISPR15-2005. It can coordinate Lisun EMI-9KB or EMI-9KA EMI Receiver System for EUT magnetic field radiation test [...]

Shanghai Lisun (India) 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, [...]

UV-C LED Prospect

With LED technology development, LED applications in market are more and more wide. UV-C LED germicidal disinfection applications market also reaches a new height in 2016, prospects are bright. With more and more LED companies launch new products, UV-C [...]

The main differences between the LED drive standards ANSI / UL8750 and EN61347-2-13

In recent years, many manufacturers are planning to manufacture common global LED drive products with a wide voltage input. But since different countries have different product standards, it results in some difficulties and obstacles in the design and production. [...]

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 [...]

Standard LM-79 and LM-80 comparison

IES LM-79-08 Approved Method: Electrical and Photometric Measurements of Solid-State Lighting Products. IES LM-79 standard is mainly for photoelectric performance measurement. Generally it is for whole lamp. Main measurement parameters as follow: Electrical Measurement: Voltage, Current, Power and Power Factor. Colorimetric [...]

How to select standard sight source and tested samp

1. The allowable tolerance range of standard light source calibration and retest results is as follows: X, Y Chromaticity Coordinates: ±0.0008 Color Temperature: ±10K Luminous Flux: ±5‰ 2. The allowable tolerance range of contrast light source/ luminaires retest results as follows: X, Y Chromaticity [...]

IESNA-LM-80 for LED Lumen Maintenance Test

IESNA-LM-80 (Measuring Lumen Maintenance of LED Light sources) is an approved method by Lighting Engineering Association of North America (IESNA) for the third generation SSL products; it mentioned the measurement standard and method. The main purpose is that measure [...]

IEC60598 General Requirements and Tests

With the fast development of electrical industry in China, manufacturing enterprises scale grows constantly, international electric safety standards apply more and more widely. Lighting industry standards are also widely used. International standard IEC60598 general requirements and test cover classification of [...]

According to IESNA-LM-79, How to Choose the Integrating Sphere and Goniophotometer

IESNA-LM-79 (Electrical and Photometric Measurements of Solid-State Lighting Products) is a standard made by Illuminating Engineering Society of North America; this standard put forward the measurement standard and method, which clarify the test parameters, testing equipments, measurement rules and [...]

How to Choose the Right LED Lighting with Appropriate Color Temperature?

Different color temperature will give us a different feeling. In a different environment with the same brightness, the object’s color we can see will be a great difference. It is not difficult for us to find that there are [...]

Surge Immunity Test Combination Wave Generator

Combination wave generator is a high reliability analog lightning surge generator designed for lightning production enterprises. It is suitable for Electromagnetic compatibility (EMC) – Surge immunity test. It can test impact current absorption capacity and impact current anti-jamming capability [...]

The development, application and test standards of LED street lights in the Southeast Asian market

Nowadays, with the development of LED industry, its technology continues to be mature and has widely applied at home and abroad. Comparing to mature markets in Europe and America, LED lighting industry also has been very popular in Southeast [...]

IEC62262 for LED Luminaries IK Protection level Test

IEC62262(How to install the EUT when doing the IK degree protection test, ventilation requirements, quantity of hammer, distribution of the hammer and hammer each level corresponding), the IEC62262, IEC60598 (GB7000) and IEC60068-2-75 (GB2423.55) standards applications IK degree test with [...]

Type of Lamp Caps

We know that LED lamps have many models. Here we introduce the main models. It is classified as bayonet, screw and so on from installation methods. It is classified as bakelite, plastic, metal and ceramics from materials. Usually lamp holders [...]

Characteristics and Applications of Different Type Goniophotometer

According to IESNA-LM-79 standard, Goniophotometer is used for light intensity distribution and flux test. Accordingly, Lisun Group introduced several different types Goniophotometer, the following introduces its characteristics and application. Lisun LSG-2000 LM-79 Goniophotometer with Rotating Mirror is an automatic light [...]

Testing requirements and advantages of LED lights applied in the automotive market

LED automotive light adopts LED (light emitting diode) as a light source. Since the LED possesses advantages of high brightness, variety of colors, low power consumption and long life, and it has enhanced that daytime running lights must be [...]

How to understand the intensity distribution curve?

Definition: Means luminaries or light sources emit light intensity distribution in space. It can record the luminous flux of luminaries, light quantity, power, power factor, the size of the luminaries, luminaries efficiency including manufacturer of luminaries, type and other [...]

Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment

Standards GB17743-2007 / CISPR 15:2005 <Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment> instead of the standards GB 17743-1999 and GB 15734-1995. The limits for the 2m loop diameter apply to equipment not [...]

IES Files

The lighting industry practitioners must be familiar with IES file. Firstly introduce IES, IES is short for Illuminating Engineering Society of North America. I.E.S is founded in 1906, it is a technical Institute. Institute standardization work is responsible by [...]

Standard operating procedures of Spectroradiometer & Integrating Sphere System

Spectroradiometer & Integrating Sphere System as main test device to measuring LED lamps, it’s as a most important device to judge the quality of lighting products. How to operating these device and make it have better work condition became [...]

The evaluation and measurement standards of LED blue light hazard

LED blue light hazard is to evaluate the photochemical damage of the blue radiation to the retina. In practice, we may observe the light source or luminaire emitting surface in different regions from different angles. Therefore, in order to [...]

The Relationship between LED Heat Dissipation and Junction Temperature

LED heat dissipation has become more and more attention by people, this because its Lumen decay or its life is directly related to its junction temperature, bad heat dissipation, junction temperature is high, life is short, according to the [...]

Lisun on the 2016 Frankfurt (Lighting+ Building) Fair

The ninth Frankfurt Light + Building(2016) was hold in Germany Frankfurt exhibition center (Messe Frankfurt). The biennial global lighting event attracted about 2500 companies exhibitors from around the world, and more than 200000 professional audience. Lisun attract the attention of [...]

Goniophotometer Dark Room Design

Goniophotometer is mainly used for measuring photometric characteristics of luminaries and light source; that is luminaries laser photometric and colorimetric value distribution in different spatial directions. Goniophotometer should be placed to do test in dark room. Many customers concern the [...]

Types & Test Methods of Luminaires Goniophotometer

The most critical factor that affects the quality of lighting is the luminous distribution performance of lamps. Using scientific testing methods and selecting the appropriate test instrument is the basis of obtaining accurate luminous distribution properties of luminaires. The [...]

Basic Environmental Test for Luminaire

During World War II and after the war, Western countries, especially the United States, have established a series of environmental testing ground, laboratory and developed environmental testing standards. Required by the US military, all weapons equipment, parts, materials, and [...]