d, the position of the normal arrangement of the thermal test good lighting, in addition to the already bonded to the measured thermocouple on the led d1, but also detection of the principal in accordance with the requirements of the radiator in the led lighting in some specified point or some point on the shell lamps adhesive thermocouple, (can be single or multiple thermocouple). each thermocouple is connected to the thermometer, so that the lighting in the under 25 lusm1 for 8 hours. (2) according to the led lighting conol device output to d1 of the measured operating current value, set the test constant current power supply circuit in figure 2, a measured pass on to the d1 current.led sign board
therefore, only in comparison with a light source, can be determined according to ambient light meter measuring the response. in the comparison of different light sources, illumination measured by the value of the level of illumination, and can not accurately represent the brightness of the visual response to the environment.blue led products come out, open the full color of the led billboard display panel application development, due to the emission characteristics of light-emitting diode, led with a small size, low power consumption, long life, resistant to collisions, etc., as production technology, equipment, improvements, rationalization of product prices accelerated, and then expand the led indusy in applications such as home appliances lights, car lights, affic signs and outdoor billboards and other large-scale. successful development of white led, it will be the interior lighting and mobile phone replacement backlight panel.led message displays
night landscape the entire lot is currently a sense of unity is not song, light visual rhythm, rhythm, order, scattered, unable to consider the color balance, the lack of overall planning and the night overall image of the landscape planning. bright bright bright area with no rational division, lighting and decorative lighting function is not effective combination, showing the landscape along the road brightness and brightness differences, and lack of seet lighting architectural lighting. architectural lighting to floodlight the main, light pollution and power consumption, does not reflect the concept of green lighting. part of the consuction landscape landscape lighting design quality is not high, greater use of flood lighting or a simple outline of crochet, lighting are relatively simple. led message display