How to detect the solar street lamps light source of solar energy street light which good life

LED solar street lamps light source, affect the normal use of the solar street light, it is recommended that the choice when choose long life LED light source, so how to detect the life of the solar street light? Select 5 LED street light, only under 25 ℃ ambient temperature, with different

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LED solar street light' Solar street light is a crystalline silicon solar battery power supply, valve control type sealed and maintenance-free battery ( Gel battery) Store electricity, super bright LED as light source, lamps and lanterns and controlled by the intelligent charging and discharging controller, is used to instead of the traditional public power lighting lamps. 】 Illuminant, affect the normal use of the solar street light, it is recommended that the choice when choose long life LED light source' LED light source is the light emitting diode ( 领导) For light source of light. 】 The life of the solar street lamps light source, so how do you test? Select [5 only LED street lamp LED street lamp is made of street lamp, LED lamps and lanterns with high efficiency, safety, energy saving, environmental protection, long service life, fast response speed, high color rendering index of unique advantages, the city lighting energy saving is of great significance. 】 At 25 ℃ ambient temperature, accelerated life tests with different current, it is concluded that the mathematical model of light output attenuation: y = exp 【 Exp, in higher mathematics in a natural constant e at the bottom of Exponential function, model aircraft noun, it is the full name of an Exponential ( Index curve) 。 】 ( - αt) The alpha = m * exp ( nI) , y said relatively light output, alpha said attenuation constant, time for t light, m, n is constant, I for the test current. According to the different electricity flow get about y and t test data, finally draw on different the attenuation coefficient of lamps and lanterns' The attenuation coefficient is also called the attenuation constant. 】 Alpha, calculated the optic retention' Light under the conditions stipulated in the flash point, light the luminous flux during the life of a specific time and the ratio of the initial luminous flux of the lamps, said by percentage. 】 In 70% of the value of life. A temperature as the acceleration of constant stress, calculated under 25 ℃ failure criterion of 70% when the life expectancy of the LED lamps and lanterns' Life expectancy is also called the average life expectancy and life expectancy at the age of 0. 】 。 Choose five same specifications of the LED street lamp, to regulate the temperature of the oven, respectively in 50 ℃, 80 ℃, 100 ℃, 120 ℃, 150 ℃ condition, the rated current, constant current conditions as a condition of constant acceleration, record all the 5 groups LED reliability test process parameters: the light output ( Illumination intensity or flux 【 Luminous flux ( luminous flux） Refers to the radiation power of the human eye can feel, it is a band of radiation energy per unit time and the product of the relative rate of visibility of the band. 】 ) , test time, current, power, temperature, etc. , thus draws the failure judgment under 25 ℃ is 70% life expectancy. Above is the solar street lamps light source life test method, through the above method can effectively detect the source of life. If you want to buy solar street lamp, can contact me.