In today’s life, LED is applied for widely usages in order to save energy. And as we know that it needs a power driver which will directly affect the life of the LED. Therefore, how to make well a LED power driver becomes the most important for LED power supply designers. 1. The power driver will directly affect the life of LED LED power driver includes digital driving and analog driving two typ...
LED street lights become more and more popular in recent years, but a few days ago, the American Medical Association (AMA) just issued an official statement, warning that if the LED lights are too white and bright, it will release a large amount of blue light and expose to people directly, which would not only increase the probability of an accident because of the glare while driving, but also aff...
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 Arrhenius method, each drop 10 ℃ temperature, life will extend 2 times. From fig 1 we know, if the Junction Temperature can be controlled on 65℃, then the ...
According to IESNA-LM-79 standard, Goniophotometer is used for light intensity distribution and flux test. Accordingly, Lisun Group is goniophotometer manufacture introduced several different types Goniophotometer, the following introduces its characteristics and application. Lisun LSG-6000 LM-79 Goniophotometer with Rotating Mirror is an automatic light distribution intensity 3D curve testing sys...
India lighting market develops rapidly, research reports point that LED lighting market scale will reach 1.14 billion dollars, growth 47.1%. India government intends to make India to be the lighting products export hub for East Asia and Gulf States, many international large factories have India as the production base for the global market, so India LED lighting market domestic and external demand ...
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 luminaries according to degree of protection against ingress of dust, solid objects and...
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 and records the LED lumen maintenance change along with time, in other word, it is applied to test LED aging life. Compare with the...
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 such as E27 are the most common energy-saving lamp screw lamp holders, while fluorescent lamp holders are usually called T8 lamp holder or T5 lamp holder etc...
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 etc. The key point for this standard is to provide guidance for testing the luminous flux, color tem...
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