During the measurement of luminous flux with integrating sphere, comparing with common lighting source, the luminous flux test accuracy of LED lighting source have given huge challenge to the testing equipments. On the one hand, LED light source have outstanding directively characterizes than other ordinary light sources. Normally it wouldn’t uniformly emit lighting at all the direction on the w...
The ideal integrating sphere paint should have below performances: 1. High-Lambert characteristics (good diffuse reflection characteristics) 2. High reflectance in a wide wavelength range 3. High stability 4. Easy construction 5. Easy to remove The history of integrating sphere coating: In 1934, Principle of Optics mentioned the description of principle of integrating sphere and the formulations o...
According to IESNA-LM-79-80, when spectroradiometer integrating sphere system tests LED flux, light source’s self-absorption can influence test result, therefore, it usually introduces Auxiliary Lamp. The induction of absorption Auxiliary Lamp can solve the absorption problem of the tested lamp itself. How to use Auxiliary Lamp correctly? Lisun LPCE-2(LMS-9000A) High precision Spectroradiomet...
Goniophotometer measures light intensity performance measurement of luminaries and light source, which is the photometry value in different directions in space and color distribution. Goniophotometer should run in dark room, and what are the requirements for the test environment? The size requirements for dark room: for example, such as LISUN LSG-6000 LM-79 Type C Mirror Goniophotometer System. Ac...
As far as we known that there have several type spectroradiometer, such as CCD spectroradiometer, mechanical scanning spectrophotometer etc. Generally, the type of spectrometer depend on what’s kind of lamp will be test, because the spectrometer is designed according to light-emitting characteristics. There have two kind of spectrometer in the market: one is Fast CCD Spectroradiometer; another i...
As we known that the quality of LED products depend on lumen, lumen efficiency temperature and CRI etc parameters, the general test device is application with spectroradiometer & integrating sphere system to measuring electrical, photometric and colorimetric parameters. This system mainly testing lumen, CCT, CRI, spectrum, SDCM, voltage, current, power and power factor etc. As general test dev...
USA Environmental Protection Agency(EPA) and Department of Energy(DOE) successively released Energy Star and Lighting Facts Standards for LED Luminaires/Bulb from 2010, which makes relevant industry persons have LED Lighting products standard to follow. At present, international LED large manufacturers for LED product Life evaluation and product specification are also on this basis. That is to sa...
As in previous year, Lisun and its instruments appeared at booth ED-A01 of Hong Kong International Lighting Fair (Autumn Edition) during 27th October to 30th October. Many regular customers came. Most of them were satisfied with Lisun’s instruments and servive and had a lot of intrest in further coorperation with Lisun. Many new customers came too, and showed willingness to begin the first coorp...
The equipment for electrical safety performance test is in rapid development of modern science technology; all kinds of electrical and electronic equipment are into all fields of social life and become an important symbol of social civilization and progress. All kinds of electrical appliances and electronic equipment are used in both urban and rural areas and have rapid popularization, which br...
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