Who is stealing the Milky Way under the Dome? It is imperative to replace traditional lighting with LED lights.
“Who stole the Galaxy?†After Chai Jing’s investigation into the incident, as a member of the LED lighting industry, we had to reflect on what we did wrong for the environment.
Excessive outdoor lighting not only causes high energy consumption, but also affects the surrounding environment. This may mean that one day you will never see the stars in the night sky again. The use of high-efficiency light sources and high-efficiency luminaires with less scattered light with intelligent control systems is the future of lighting solutions.
According to the German Federal Emission Control Act, if the form, scope, and turn-on time of light can cause risks, cause significant adverse effects, or mental stress to the public, it can be considered a devastating impact on the environment.
What is caused by streetlights, advertising lighting, floodlighting, and night sky lasers, which can be seen very clearly in big cities or towns, what we call light pollution is having a wide-ranging impact on nature.
Artificial lighting has changed the circadian rhythm of many people.
The artificial lighting environment affects the plant's growth cycle, and now you can rarely see night creatures such as owls or fireflies.
Astronomical activity areas that need to maintain a high dark sky are also rarely strictly controlled.
Effective outdoor light control:
Scattered light is a big cause of bright night sky. Professional planning can mitigate this impact and reduce energy consumption.
In professional planning, the light intensity and brightness required for complex outdoor lighting need to be defined according to the standard. It also needs to select the appropriate optical system to achieve the purpose of controlling light. For public space lighting, it is necessary to control the lighting time according to the basic needs, minimize the light emission, and improve the energy efficiency of the lighting system.
This is not only beneficial to the environment, but also brings about social benefits through the improvement of the quality of life.
Annotation: The following pictures and texts are only used to illustrate the difference in light pollution caused by different lighting products. It does not mean that such lamps can achieve the data effect.
[a] Conventional spherical bare lamps: about 50% of the scattering loss in the night sky; about 30% of the scattering loss in the inactive area or surface; the luminous flux that can be utilized is about 20%.
[b] Conventional bare light source, lamp with lampshade: about 30% of the scattering loss in the night sky; about 30% of the scattering loss in the inactive area or surface; the luminous flux that can be utilized is about 40%.
Dual-band WiFi module refers to the WiFi module that supports both 2.4GHZ and 5GHz bands. The dual-band WiFi module can operate in the 5Ghz band, which is much cleaner and can easily avoid interfering with each other. The advantage of 2.4G is that it has good ability to penetrate the wall, and the disadvantage is that it is easy to be disturbed. The advantages of 5G are strong anti-interference ability, wide band width, high throughput rate, and strong scalability, but the disadvantage is that 5G is only suitable for indoor small-range coverage and outdoor bridge, and the attenuation effect of various obstacles on it is much larger than 2.4g.
Dual-band WiFi module has a stronger and more stable Wifi wireless signal, higher transmission speed, and can make wireless devices more power-saving, to meet the future high-definition and big data wireless transmission needs.
When selecting a dual-frequency WiFi module, we should pay attention to these parameters of the WiFi module: size, package, frequency range, data rate, transmission rate, transmission distance, communication interface, power supply voltage, antenna interface, etc.
Dual frequency WiFi module can well meet the functional needs of users, increase the competitiveness of the product, while the WiFi module is easy to use, can shorten the user product development cycle, speed up the product market! Users can make choices according to actual needs!
Choosing a dual-band WiFi module may need to pay attention to the following points:
(1) Consider the transmission power of the dual-frequency WiFi module
The transmitting power of the WIFI module is generally about 18dBm, and the transmitting power of the high-power WIFI module is about 28dBm.
(2) Transmission rate
Consider whether the dual-band WiFi module supports MIMO technology (that is, allows multiple antennas to send and receive multiple spatial streams simultaneously)
(3) Consider the application interface that dual-band WiFi modules can provide, which is also very important.
(4) According to the requirements of the application scenario to choose the dual-band WiFi module, not the higher the configuration, the better, the application is good, excess waste!
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Shenzhen MovingComm Technology Co., Ltd. , https://www.szmovingcomm.com