LED Tester | Christmas Light Tester - LISUN

LISUN engineer do installation & training in Mexico   In March 2017, LISUN engineer went to Mexico to do installation and training for customer. The customer purchased LSG-1800B High Precision Rotation Luminaire Goniophotometer from LISUN. LSG-1800B Goniophotometer is automatic goniophotometric instrument for luminous intensity distribution measurements with facility for turning the light source. The LSG-1800B use a constant temperature detector, Japanese Motor and Germany precision angle coder which keeps high test accuracy, you can learn more details at: http://www.lisungroup.com/product-id-339.html. Finally, we share some photos: [caption id="attachment_7950" align="alignnone" width="928"] Picture 1: LISUN engineer and customer are doing installation[/caption] [caption id="attachment_7951" align="alignnone" width="928"] Picture 2: Customer are operating the LSG-1800B Goniophotometer[/caption] [caption id="attach...

LISUN engineer visit Turkey do installation and training in February 2017   LISUN engineer Jacky went to Mexico to do installation&training taskIn February 2017. This customer purchased a set of LSG-1800B High Precision RotationLuminaire Goniophotometer and LPCE-2 CCD Spectroradiometer &Integrating Sphere Compact Test System from LISUN. The customer is very enthusiastic, they are satisfied with the installation and training, and Jacky had a nice trip here. Finally, we share some photos here: [caption id="attachment_7941" align="alignnone" width="800"] Picture 1: Jacky and customer have finished the installation of Goniophotometer[/caption] [caption id="attachment_7942" align="alignnone" width="800"] Picture 2: Jacky and customer have finished the installation of LPCE-2 Spectroradiometer & Integrating Sphere Test System[/caption] [caption id="attachment_7943" align="alignnone" width="800...

Installation & Training  in Brazil After doing  install and traning for EVERLIGHT INDUSTRIA E COMERCIO LTDA, Lisun engineer visit local another customer Studio XXI Metalurgica Eirelli and also provide the customer with install and training, this time they purchased LSG-1700B  high precision rotating luminaire goniophotometer . The visit went off successfully, as was to have been expected. Besides, With tremendous technical strength, honest services, reasonable price and good reputation, we have got high praise from the customer. Before the ending of the visiting in company, the customer said that they would purchase LISUN instruments if they still have other need later. For this visiting in Brazil, it  is meaningful and happy for our engineer. The following is some install & training photos at customer side: [caption id="attachment_7897" align="alignnone" width="600"] Figure 1: LSG-1700B high precision rotating luminaire goniophotometer[/caption] ...

There is a wide range of goniophotometers on sale in the market, including central rotation type, rotation mirror type, double mirror type and so on. How to choose the corresponding goniophotometers for the tested lamps becomes the most important problem for the users. This article makes a brief introduction to this knowledge based on LM-79 and EN 13032-1. A-α B-β and C-γ Co-ordinate System According to EN13032-1, no matter what kind of goniophotometers is used, the main measurement plane must be based on the picture below when measuring the light distribution performance of the luminaire 1.    First axis 2.    Second axis 3.    Third axis 4.    Photometric Center On this basis, the main coordinate systems used in the past are the following three: 1.    A-α：This coordinate system has not been used any more when testing conventional lamps and is only used to measure special lamps such a...

Our Engineer Went to Brazil to Install for our Customer After completing installation training in Mexico  in April 10 th   2017, our engineer went to the Brazil. In April 13, 2017, the Engineer arrived. This time we plan to visit our customer in Brazil which is named EVERLIGHT INDUSTRIA E COMERCIO LTDA. The company is also famous in local marketing. Ever Light products are found in shops specializing in lighting, strategically located in the main cities and towns, covering all regions of Brazil. They purchased LSG-1700B high precision rotating luminaire goniophotometer and LPCE-3 (LMS-7000VIS) CCD spectroradiometer integrating sphere compact system for LED from Lisun Group. Lisun Engineer visited their company, and help them to install the equipment, also gave a training course to them and teach them how to operate the instruments and etc. Below are some pictures. [caption id="attachment_7822" align="alignnone" width="800"] Figure 1: LSG-1700B High Preci...

The Role of Integrating Sphere Integrating Sphere plays the role in below three aspects. 1. Optical Receiver The measured light enters the sphere through the hole of integrating sphere. We set up one or two photo detectors on the inner wall such as selenium photovoltaic cells or photomultiplier tubes. The output light detector of the photo detector is proportional to the illuminance of the integrating sphere inner wall, which is proportional to the luminous that enters the integrating sphere. In this way, we could obtain the flux change of integrating sphere according to the change of output photocurrent. 2. Uniformly illuminated surface Several bulbs (usually four or six) are evenly arranged symmetrically on the inner wall of the integrating sphere. The light emitted by the bulb diffuses on the inner wall several times to form a uniform bright luminous sphere, which can be used as the uniform brightness, large field of view (2w>140 degrees) object surface (Optical system entrance ...

CIE Lighting Body and Standard Illuminant When you measure the photometric and chromaticity properties of optical system, it must be under the uniformly prescribed light source, the test result can be compared with each other. In order to unite the measurement standards, the International Commission on Illumination (CIE) provides the lighting body and standard illuminant. The definition of “illuminant” and “lighting body” by CIE separately: “illuminant” refers to a physical radiator that emits light such as lamps and sun. “Lighting body” refers to a specific relative spectral power distribution, which is not necessarily achieved by s specific light source, but it is given in a data table. CIE provides the spectral distribution of the “Standard Illuminant” and “Standard Lighting Body”. CIE standard lighting body A, B, C, E, D Standard lighting body A represents the complete radiator radiation at the absolute temperat...