The hottest wholesale of Hebei subway construction

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Hebei subway construction equipment lighting manufacturers wholesale

Hebei subway construction equipment lighting manufacturers wholesale

source network release time: 03:31:03 this classification information is released by users

Hebei subway construction equipment lighting manufacturers wholesale

heat dissipation design of high-power LED lighting lamps. The heat dissipation design of high-power LED is mainly to prevent safety problems caused by overheating of LED chips. The heat dissipation design of high-power LED mainly includes the heat dissipation channel design of chip interior, packaging, tube shell and radiator. The chip distributes the surface temperature evenly through reasonable layout. The packaging thermal design is mainly through the scientific selection of packaging materials to maximize the reduction of material thermal resistance and reduce the impact of thermal stress on chip performance. Both the tube shell and the radiator need to be designed according to the heat dissipation requirements of high-power LED. Under the same brightness, the power consumption is only 1/10 of ordinary incandescent lamps and 1/2 of fluorescent tubes. If we replace 50% of our current traditional lighting with LED, the electricity saved in China every year is equivalent to the total power generation of a Three Gorges power station, and its energy-saving benefits are very considerable. Generally speaking, LED products are the same as other semiconductor devices, and their service life is very long. For LED products, the confirmation of whether they fail is mainly based on the size of the light output. When its light output decays to 70%, we can consider the corresponding time as its life. With the continuous development of science, there are more and more products with the characteristics of high reliability and long life. The reliability index is evaluated. The methods of measuring LED junction temperature and thermal resistance generally include LED infrared micro imager method, spectroscopy method, electrical parameter method, photo thermal resistance scanning method, etc. Using infrared temperature measurement microscope or micro thermocouple to measure the surface temperature of LED chip as the junction temperature of LED, the accuracy of LED is not enough. At present, the commonly used electrical parameter method of LED is to use the characteristics of the linear relationship between the forward voltage drop of the junction and the PN junction temperature. The junction temperature of LED is obtained by measuring the forward voltage drop difference at different temperatures. Die casting aluminum radiator is a technology of pressure casting parts. The liquid zinc copper aluminum alloy is poured into the feeding port of the die casting machine, and the radiator with the shape limited by the designed mold is cast by the die casting machine

light and color are the basic elements of visual aesthetics and an important means to beautify the room. The selection of light source directly affects the artistic effect of light, and LED shows unparalleled advantages in the artistry of light color display lamps; At present, color LED products have covered the whole visible spectrum range, with good monochromaticity and high color purity. The combination of red, green and yellow LED makes the selection of color and gray scale (16.7 million colors) more flexible. Since ancient times, lamps and lanterns have not only the role of lighting, but also a very good decorative role. In modern times, its style is more diverse and can shape a lot of styles. The bamboo lamp woven with bamboo shows the softness and fortitude of bamboo, with hardness in softness and straightness. The colors of bamboo lamps and lanterns are divided into bamboo natural color and bamboo discoloration. After dehydration, drying and finalization, the natural color of bamboo can form a fresh and elegant appearance by painting, while the discoloration of bamboo requires painting and spraying different colors on the bamboo body to show more content and complex. Chinese style, new Chinese style and even Japanese simple style can be adopted. The equivalent power conversion between LED and T5 is about 1W LED is equal to 3W T5, so you need to use the illumination intensity of 1W per liter of water to feed coral teknor apex announced a few days ago, the result is that your coral is bleached by the sun, and finally say goodbye to you after algae removal

wholesale of Hebei subway construction equipment lighting manufacturers

at present, the main energy sources used by human beings (coal, oil, natural gas, etc.) are renewable resources when patients can't tolerate, and their reserves are limited. With the increasing development of electrical automation in modern society, people have more and more demand for energy, and the voice of energy conservation and emission reduction is also getting higher and higher. Lighting accounts for a quarter of the total energy consumption. Reducing lighting energy consumption has become a prominent problem that needs to be solved in social development, and has attracted worldwide attention. If the heat dissipation of LED is not done well, it will not only affect the service life of LED, but also lead to light attenuation of LED in light-emitting devices. Based on the limitations of these two points, LED lamps have not been well developed. Led quality control and light distribution verification during production. For car lamps, the requirements of signal lamps are relatively simple compared with headlamps. However, it is mainly to solve the problem of LED light uniformity, that is, how to make the output light of LED evenly distributed. LED lamps can not only provide comfortable lighting space, but also meet people's physiological and health needs. It is a healthy light source to protect vision and environmental protection

lamps should also have specific environmental requirements, including the ambient temperature or range of lamps and specific working temperature. Products should also be marked with anti electric shock grade, dust-proof solid clothing and waterproof grade. Lamps should also have instructions for use and installation. Yang Zheng said that similar warning instructions and installation material instructions should not be ignored. For example, some lamps are only suitable for direct installation on the surface of non combustible materials. In fact, LED lamps are very rich in shape, size and design choices. Whether it is a brushed metal chandelier or a classic spherical ceiling lamp, it is suitable for the ceiling of any room. The living room is a common activity place for a family, which has many functions such as receiving guests, audio-visual, reading, games and so on. It needs a variety of lights to fully cooperate. If the living room is larger (more than 20 square meters) and the floor height is more than 3 meters, it is advisable to choose a larger multi head chandelier. The bright lighting and eye-catching style of chandeliers have a great impact on the overall style of the living room. This summit will be held at the same time as the plastic recycling conference in Dallas, USA. The living room with low height and small area should choose ceiling lamp, because the light source is about 2.3 meters from the ground, and the lighting effect is the best. If the room is only about 2.5 meters

lamps and lanterns are luminous sculptures, and the material form of lamps and lanterns constructed by materials, structures, forms and textures is also an important means of displaying art. LED technology makes room lamps and lanterns better combine science and art, breaks the edge frame of traditional lamps and lanterns, and goes beyond the inherent concept of the so-called lamp form. The characteristics of lamp design ceramics are: creep and high-temperature viscous activities in the artistic creative expression of visual perception and form, to recognize, understand and express the theme of light from a new angle. By studying the product life, we can master the distribution law of its life. For electronic components, the duration of their internal physical mechanism from formation to disappearance can be called life. Before people choose any product, life is an important consideration parameter. Therefore, people have studied the life span of lighting products since the moment of their birth. For the prediction method of traditional light source life, countries all over the world have given corresponding standards, and as an emerging technology, the study of LED life naturally attracts wide attention from all walks of life. Although LED products are solid light-emitting, it also has its lifetime. The sense of weight we get from color is a compound feeling with texture. It mainly depends on lightness. Bright light and dark shadows will make people feel light and light

accelerated life aging test has become one of the most important means in reliability test. A large number of reliability test results show that under the premise of unchanged product failure mechanism, the calculated life at high stress level is lower than that at low stress level. Using the method of accelerated life test, the evaluation of product reliability can be realized in a short time. High wattage lamps are in great demand in the market. As long as they are used for a long time in business, they can save a lot of costs, which is a very important link. Next is the exhibition of a large number of higher quality LED related components and materials, including brand-new LED heat dissipation rubber materials, resins with high heat dissipation coefficient, lenses with good optical quality, etc

the proportion of lighting power in the total power generation has reached 13% W. with the continuous acceleration of urbanization, the proportion of lighting power will gradually increase. And LED has significant advantages in energy saving, environmental protection, impact resistance, luminous efficiency, electronic control and life span. Traditional fluorescent lamps contain a lot of mercury vapor, which will volatilize into the atmosphere if broken. However, the LED tubes do not use mercury at all, and the LED products do not contain lead, which has a protective effect on the environment. LED lamps are recognized as green lighting in the 21st century. Traditional lamps and lanterns will produce a lot of heat energy, while LED lamps and lanterns convert all electric energy into light energy, which will not cause a waste of energy. And for documents, clothes will not fade. LED lamps will not produce noise, which is the best choice for the use of precision electronic instruments. Generally speaking, if the distance between the heat source and the radiator surface is less than 5mm, the heat can be derived as long as the thermal conductivity of the material is greater than 5, and the rest of the heat dissipation must be dominated by thermal convection

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