LED light source visual light intensity measuremen

pbn523f1y

Led lighting apparatus to ensure led work provides a target junction temperature limit, while and the module also makes led light, color, electrical parameters of the measured parameters closer to the actual application conditions. [Only registered and activated users can see links. ] the article also describes the use of led lighting equipment such as measuring the junction temperature of led and led reference point to determinethe limits of temperature and a function of junction temperature. this rapid assessment using led lighting apparatus of the state and life provides an effective way. first, the preamble for a new product, the product itself is always ahead of the development of product standards and testing methods.
in relation to the main content of this draft for approval to introduce the standards established by the terms of the whole story, the product requirements and test requirements for the majority of peer reference. first, the output voltage and current one, starting and control devices connected within the requirements of led-related energy storage and output capacitor connected at startup or when the led,[Only registered and activated users can see links. ] resulting in a short period of surge voltage or surge current, surge capacity of these unchecked, may result in shortened life span of led or damage.
test line in figure 3, for a stable output voltage control device, when the input voltage rating of 92% to 106% range changes, the output voltage change compared to the rated voltage of led modules, the deviation should be less than lusm10 %, for anon-stable output voltage control device, at rated input voltage, [Only registered and activated users can see links. ] output voltage should be in line with the led modules are rated voltage lusm10% range. 2.2 led control output current control device controls the output current of the led control device.