IP65 waterproof led floodlight: Recent Episodes
Sunshinelux
The general chemical formula of yttrium aluminum garnet is: (RE1-rSmr)3(Al1-sGas)O12:Ce (1) In formula (1), RE=La, Lu, Y, Gd, Sc, 0\;rrGa3+(eight coordination)=0.69 \;, rY3+(eight coordination)=1.04 \;, rAl3+(six coordination)=0.62 \;, rLu3+(six coordination)=1.001 \;[4]. Combined with the matching degree of ionic radii, in theory, the thermal stability of the crystal structure formed by complete substitution is better than partial substitution. From the material point of view, the thermal stability of the material itself can be characterized by the thermal quenching performance.
Figure 1.3 shows the relationship between the thermal quenching performance of GRF-G and GRF-L. It can be seen that the brightness attenuation of the powder shows a downward trend as the temperature rises. The quenching performance is better than the thermal quenching performance of GRF-G. \
; Figure 1.3 Thermal quenching performance experiment of GRF-G and GRF-L Ga-YAG and LuAG are GRF-G and GRF-L respectively. The morphology under the electron microscope is shown in Figure 1.4, and GRF-G and The particle shape of GRF-L is approximately spherical, and its surface is smooth. \; Figure 1.4 The left and right pictures respectively show the SEM morphology of GRF-G and GRF-L. GRF-G and GRF-L are used as yellow-green powder to encapsulate 2835 finished lamp beads.
The luminous flux of China LED Wall Pack Light manufacturers beads is between the test temperature The change of is shown in Figure 1.5, it can be concluded that the cold-to-heat ratio of luminous flux gradually decreases with the increase of temperature, and the light output cold-to-heat ratio of WLED at 85℃ is better than that of GRF-G. \; Figure 1.5 WLED light output cold and heat ratio of GRF-G and GRF-L is better than GRF-G and GRF-L WLED light output ratio, GRF-L is better than GRF-G,
The following is explained in three paragraphs. The middle value of the LED in Table 1 is 3. If the lamp uses another current, or the peak value of the ripple current of the power supply changes greatly, the voltage value should be re-estimated according to the V-I characteristic curve.1A (399W) conditions in a steady state, and the worst case is 207V (435W). LED power supply selection: Recommended model HLG-480H-C2100, the reasons are as follows. Voltage calculation example A lamp uses 100 LEDs to drive at 1. Step 2: 50 strings, so the total voltage is 50 times that of a single LED.
When the machine is cold, the highest voltage will reach 249V. The designer does not need to spend more budget to select a higher power power supply to ensure the short-term demand for turning on. Step 4: Refer to the temperature coefficient. In other words, the power supply does not need to unconditionally reserve the voltage margin required for the cold start, but only needs to temporarily increase the output voltage range for a short period of time after the start.
How should the designer determine the appropriate LED power supply? Method 1: Ask the LED manufacturer if there is any tool software available, enter the parameters, and get the answer directly.?In the design of lamps and lanterns, how to estimate the voltage of the LED is a seemingly simple knowledge that requires attention to many details.2V at 85°C, and 3. The main purpose of the lamp is of course to meet the light requirements of the application environment, such as illuminance or color temperature and so on.125 <1. There are also many possibilities for other models.
Figure 4 V-T curve microwave sensor ufo led high bay light constant power series also have similar functions. After the LED is turned on, the voltage will gradually drop back to the normal level due to self-heating. In addition, in view of the influence of temperature, the new LED power supply has the function of adapting to the environment. 1 Ideal V-I curve Fig.2 Cold The median value of the total LED voltage at startup is 190V x 1.
(Editor in charge: Flora). Deputy Director Ye Jingtu put forward three suggestions: First, we must firmly grasp the development of substrate material technology, use substrate technology as the strategic support point of the LED industry, and form a -style LED industry standard system, patent layout, and technical route; second,
It is necessary to increase the application and promotion of LED standard optical components in brother provinces, and fully cooperate with international organizations to promote LED standard optical components from the whole country to the world; the third is to accelerate the LED industry and consumer electronics, raw materials, communications, The integration of optoelectronics and other related industries, in-depth cooperation with related industries, group development, and cultivating emerging industries and strategic growth points with huge development potential.?'Scientists represented by Shuji Nakamura won the Nobel Prize in Physics for inventing blue LED technology,
which fully proves that LED, a great technology that benefits mankind, is recognized by the world, and the entire LED industry will usher in a new development opportunity. Zhang Yanfei, deputy director of the Provincial Bureau of Quality Supervision, elaborated on the practice and results of the
Quality Supervision Bureau’s work in the LED industry, and proposed that under the new opportunity of blue LED technology to win DOB High bay the Nobel Prize in Physics, should speed up the standardization process and continuously improve the product quality supervision system , Strengthen industry self-discipline, and further improve the quality of LED products.
LED lighting outdoor IP65 slim LED flood light still need to improve component light decay and life issues. In addition, the PCB adopts the design of metal material matching and close assembly of the LED chip, which can also reduce the thermal resistance of heat conduction and achieve the design goal of quickly dissipating the high heat of the core of the light-emitting element. High-power LED light source modules have short-wavelength light.
Multi-chip packaging to meet low-cost and high-brightness design requirements. For example, manufacturers of light source products such as Philips, OSRAM and CREE have launched LED light source module products that integrate 4, 8 or more small LED chip packages. Especially short-wavelength light can cause damage to the epoxy resin. However, in order to achieve the use effect, the white light LED must be improved for the lighting application.
Therefore, the development of LED light source molds During the assembly, the packaging material must also be replaced with high heat-resistant materials. The high temperature of the chip tests the durability of the packaging material. For example, a combination of multiple LED chips must be equipped with built-in insulating materials to avoid short-circuiting of individual LED chips; this process is relatively
There are many more procedures in the monolithic design, so even if it can save costs compared with the monolithic solution, the cost gap between the two solutions will be reduced due to the additional insulating material manufacturing process. Although white light LEDs have made progress in luminous efficiency and single power performance, in fact, white light LEDs still have problems such as uniformity of light emission and life of packaging materials.
In order to cooperate with Markham City, these companies did not hesitate to give a lot of discounts, such as providing free LED smart street lighting equipment in the vicinity of the city government, or providing free smart street lighting installations outside the scope of the plan, but in the end the city government chose to cooperate in Markham City The Philips company that set up the venue is cooperating, and a certain reason is also because of its 'localization' .
The reason why Philips was chosen as the project, the LED smart street light The supplier is related to its location in Markham, and it is also a leader in technology in the industry. Xue Jiaping said that LED smart street lights have many benefits: white light lighting can be automatically adjusted according to the outdoor brightness to provide the most natural light for drivers and pedestrians; computers directly monitor each light bulb
It saves maintenance time and cost; the unique environmental protection function at night will not delay watching the stars in the sky even if the lighting is sufficient; the life of the bulb is about 20 years, which is more than four times the service life of the existing bulb. The municipal government and contractors remind the citizens of Markham that during the installation of LED smart street lights, the citizens may find that the lights near their homes are suddenly missing or the street lights 130lm led street light are bright. (Editor in charge: Nicole).
This 7 million yuan project focuses on energy saving and plans to recover the cost within 7 years. The street lamp replacement project will be completed before May next year, after which Markham will become one of the first cities in North America to use LED smart street lamps.?The Markham City Government of Canada announced on the 15th that it is replacing LED smart street lights for the main roads in the city. The installation was completed before May. Similar problems will usually be resolved within 24 hours. Representatives of the Markham City Government and contractors took a group photo at the press conference
From another point of 5 years warranty led street light, for example, a building, let alone the home part, there are a lot of lighting in the building, and there is a monitoring system, what kind of monitoring is this system?
It needs to monitor elevators, instruments, and lights, so If the LED can achieve smart dimming, power consumption and status can also achieve this smart dimming system, I think it has great value in commercial buildings. If you are an individual, you will definitely consider the cost. For the building, such skills are needed to understand what the state of the building can be.
All of these need to be done by us. How to root out light pollution and light pollution? ——Control, re-control, or control Moderator: Regarding light pollution and light pollution, Europe has strict regulations on light pollution, the highest brightness area and the lowest brightness area, and low light pollution What's the difference between the high light-damaged place and the high light-damaged place?
Think about it, your office is about 3 or 4 meters high. What kind of lighting should you use? The illuminance on the table should reach about 800 Lux. And how to use LED to solve this problem.Light pollution is controllable, and it's all caused by us. First of all, we should solve it during the design period. Don't wait until the construction process to solve it, otherwise it will be very difficult. First, the cost will increase, and second, the construction period will be affected. How to control light pollution?