According to the German arctic research camp, researchers have successfully planted and harvested 183kg of fresh vegetables including tomatoes, cucumbers, kohlrabi and so on. This successful trial not only marks that the humans have the ability to planting in the Arctic but also set an example for other researchers who try to grow plants in other harsh natural environments and outer space.
It is extremely difficult for supply ships to enter the Arctic during the winter because the sea will be covered with extremely thick ice. Therefore, It's almost impossible for staff in the Arctic to eat fresh vegetables at that time. In February of this year, The German team built a greenhouse that could withstand temperatures as low as minus 40 degrees Celsius and built vertical farms in it. The lack of sunlight in the greenhouse makes artificial lighting indispensable, for this reason, LED grow lights are used to create the light condition for the growth of vegetables. Although the tomatoes grown in this greenhouse aren't as big as those grown outside, its vitamin content exceeds that of refrigerated vegetables.
This may also be a good example for future agricultural development. Moreover, the LED grow lights that is famous for energy conservation and environmental protection also will occupy an important position in future agriculture.
2018年10月16日星期二
2018年10月12日星期五
Four points to note about home lighting #4
It is well known that different colors can reflect a person's personality to some extent. The same goes for home lighting, the different arrangement of light colors can create various lighting atmosphere and partly mirror the character and aesthetics of the user. Nevertheless, too many colors in house-lighting will make it look like incongruous as well as can't reflect the lighting style well. Furthermore, if the difference between colors is too large, it will make people who live in such a lighting environment have the uneasy and unnatural feeling.
Some user like the colorful and dynamic lighting effects of outdoor advertising, and imitate them into their house. Excessive use of RGB LED light strips, colorful spotlights, and other muti-colors lights, even though seem very magnificent, in the long term, these colorful, flickering, changing lighting effects have the negative influence on vision. This kind of LED lights is applied extensively in advertising lighting, for its dynamic light can easily draw people's attention and we won't be in this light environment for long. Therefore, the lighting arrangement of different places is different, and other lighting plans should not be directly copied. Surely, there are a thousand Hamlets in a thousand people's eyes. In normal home lighting, in order to create a comfortable and harmonious lighting environment, we suggest that take the white-light LED lights as the main lighting of the house and decorate with a few of other colors of light. If dynamic, colorful lighting is required, it can be installed separately and controlled independently.
This is the last article of HOUSE-LIGHTING series. We hope these will help you in the selection of LED lights and arrangement of home-lighting.
Some user like the colorful and dynamic lighting effects of outdoor advertising, and imitate them into their house. Excessive use of RGB LED light strips, colorful spotlights, and other muti-colors lights, even though seem very magnificent, in the long term, these colorful, flickering, changing lighting effects have the negative influence on vision. This kind of LED lights is applied extensively in advertising lighting, for its dynamic light can easily draw people's attention and we won't be in this light environment for long. Therefore, the lighting arrangement of different places is different, and other lighting plans should not be directly copied. Surely, there are a thousand Hamlets in a thousand people's eyes. In normal home lighting, in order to create a comfortable and harmonious lighting environment, we suggest that take the white-light LED lights as the main lighting of the house and decorate with a few of other colors of light. If dynamic, colorful lighting is required, it can be installed separately and controlled independently.
This is the last article of HOUSE-LIGHTING series. We hope these will help you in the selection of LED lights and arrangement of home-lighting.
2018年10月9日星期二
Four points to note about home lighting #3
From last two posts, Four points to note about home lighting #1, and #2, we learned that the brightness and CCT are the key factors that we need to notice when select and install home lighting. The different brightness and different color temperature can create a completely different home lighting atmosphere.
In post #1, we are mentioned that the luminous difference between different rooms should be controlled in the reasonable range. Our eyes will be uncomfortable and fatigued by frequently adapt to very different brightness. Post #1 represented the overall brightness of the house need to be unified. Not only the whole, as well as the small areas need to pay attention to the contrast between light and dark.
Nowadays, decorative lighting became an important part of interior lighting. Most people like to decorate the living room with LED spotlights, LED strips and other decorative lights. In general, the decorative lights are not high-brightness, which can not provide enough light for our lives. For example, if we only turn on the decorative lights on TV background wall when watching TV at night, the strong contrast of light and dark will cause the eyestrain, even vision impairment in the long run. Likewise, it is also a bad habit that reading under a small desk lamp for a long time. The low-brightness LED light strips are the popular decorative lights in the bedroom, which can also be used as the auxiliary lighting, helping us see and it doesn't dazzling. Furthermore, adding the controller to dim the LED strips also a good method, which allows us to vary the brightness according to the actual requirement.
In short, the brightness of indoor lighting should be reasonable and similar.
In post #1, we are mentioned that the luminous difference between different rooms should be controlled in the reasonable range. Our eyes will be uncomfortable and fatigued by frequently adapt to very different brightness. Post #1 represented the overall brightness of the house need to be unified. Not only the whole, as well as the small areas need to pay attention to the contrast between light and dark.
Nowadays, decorative lighting became an important part of interior lighting. Most people like to decorate the living room with LED spotlights, LED strips and other decorative lights. In general, the decorative lights are not high-brightness, which can not provide enough light for our lives. For example, if we only turn on the decorative lights on TV background wall when watching TV at night, the strong contrast of light and dark will cause the eyestrain, even vision impairment in the long run. Likewise, it is also a bad habit that reading under a small desk lamp for a long time. The low-brightness LED light strips are the popular decorative lights in the bedroom, which can also be used as the auxiliary lighting, helping us see and it doesn't dazzling. Furthermore, adding the controller to dim the LED strips also a good method, which allows us to vary the brightness according to the actual requirement.
In short, the brightness of indoor lighting should be reasonable and similar.
2018年10月8日星期一
Four points to note about home lighting #2
From the last post, FOUR POINTS TO NOTE ABOUT HOME LIGHTING #1, we knew that the significance of selecting the proper brightness in home lighting. In this post, we are going to introduce that the influence of the CCT (Correlated Color Temperature), one of the main specifications of LED lights, in-house lighting. Just like brightness, different colors of light can bring about a completely different indoor lighting environment. As we all know, the reddish white light, that is, the warm white light will make people feel relaxed and easeful, and the bluish cool white light is beneficial to concentration.
Therefore, it is improper that select the same CCT LED lights in all space of the house. Although the warm white LED light can create a warm and comfortable lighting atmosphere, it is not suitable for the activities that require concentration. Based on this reason, the living room, home office, and kitchen all are the main activity space, which is suitable for neutral white light or the slightly higher CCT LED lights. Likewise, according to the function of the bedroom and bathroom, adopting warm color lighting will be the better choice.
In the posts #1 and #2, we introduced the effect of brightness and CCT respectively in home lighting. From which, we can conclude that both the brightness and the CCT of LED lighting are the key factors to create a reasonable home lighting environment.
Therefore, it is improper that select the same CCT LED lights in all space of the house. Although the warm white LED light can create a warm and comfortable lighting atmosphere, it is not suitable for the activities that require concentration. Based on this reason, the living room, home office, and kitchen all are the main activity space, which is suitable for neutral white light or the slightly higher CCT LED lights. Likewise, according to the function of the bedroom and bathroom, adopting warm color lighting will be the better choice.
In the posts #1 and #2, we introduced the effect of brightness and CCT respectively in home lighting. From which, we can conclude that both the brightness and the CCT of LED lighting are the key factors to create a reasonable home lighting environment.
2018年10月7日星期日
Four points to note about home lighting #1
Home lighting is an important part of our house. With the development of LED technology, LED lights are applied in our house for illumination and decoration such as LED bulbs, LED tubes, LED Panel Lights, LED strip lights and so on. House lighting allows us to live like we do during the day, as well creates different atmosphere through different lights. But there are a few matters needing attention in the choice of illumination lights. Using lights incorrectly not only wastes electric energy and cost but also have a negative influence on our lives. We will cover this topic in four parts because there is too much content, hoping the posts will be helpful to you.
In this post, we are going to talk about the brightness, the most obvious factor, that has the biggest effect on human sense. As we all know, our eyes had better not often work in areas that are too bright or too dark. Because of the hard light will hurt our eyes, and the dim light makes people unable to see clearly, which result in eyestrain. Therefore, it is necessary to design different lighting schemes according to the structure of the house to achieve the proper brightness.
The functional areas inside the house have different lighting requirements. For example, the living room is an area for daily activities and entertainment, which determines that it needs to be the bright environment. Similarly, other areas of daily activity, such as the dining room, home office, reading room etc., require relatively high brightness to meet the needs. However, the light in the bedroom cannot be too bright, for it is the place for rest and the bright light is not good for sleep. Likewise, the soft light will be more suitable for the bathroom.
Furthermore, it has to be taken into account that although the above shows that various areas need different illumination intensity, the brightness of different places in a house should not be too different. Because the difference in brightness is so great, our eyes need to adjust to different brightness frequently, which can lead to eye fatigue and affect vision.
In this post, we are going to talk about the brightness, the most obvious factor, that has the biggest effect on human sense. As we all know, our eyes had better not often work in areas that are too bright or too dark. Because of the hard light will hurt our eyes, and the dim light makes people unable to see clearly, which result in eyestrain. Therefore, it is necessary to design different lighting schemes according to the structure of the house to achieve the proper brightness.
The functional areas inside the house have different lighting requirements. For example, the living room is an area for daily activities and entertainment, which determines that it needs to be the bright environment. Similarly, other areas of daily activity, such as the dining room, home office, reading room etc., require relatively high brightness to meet the needs. However, the light in the bedroom cannot be too bright, for it is the place for rest and the bright light is not good for sleep. Likewise, the soft light will be more suitable for the bathroom.
Furthermore, it has to be taken into account that although the above shows that various areas need different illumination intensity, the brightness of different places in a house should not be too different. Because the difference in brightness is so great, our eyes need to adjust to different brightness frequently, which can lead to eye fatigue and affect vision.
2018年10月5日星期五
The main materials of LEDs
The LED is mainly composed of six materials: base, silver glue, chip, bond wire, epoxy resin, and phosphor.
1. LED base:
The base, also known as the LED support and LED bracket, inside the LED is used for conducting and supporting, which is generally formed by electroplating of the metal material. There are two types of LED base, that is, cup-shaped brackets and flat brackets, which are applied for concentrated-light LEDs and wide-angle LEDs respectively.
2. Sliver glue:
The role of silver glue is to immobilize the chip and conduct electricity. The proportion of the main components is 75-80% for silver powder, 10-15% for EPOXY and 5-10% for additives.
3. Chip:
The chip is a luminescent semiconductor material, generally produced by using GaP, GaAlAs, GaAs, GaN, etc., and its internal structure has unidirectional conductivity. Due to the chip can not emit white light directly, the white light LED is a mixture of a blue-light chip and a yellow phosphor.
4. Bond wire:
The bond wire is a metal wire used to connect the wafer PAD and the holder. In production, gold wires with a purity of 99.99% are generally used, its specifications are 0.9 mils, 1.0 mils, and 1.1 mils etc.
5. Epoxy resin:
The role of the epoxy resin is to protect the internal structure of the LED and slightly change the color, brightness, and beam angle.
6. Phosphor:
At present, most of the white LED light strips, LED bulbs, LED spotlights, etc. are phosphor conversion LEDs, that is, the blue light emitted by the chip is converted into white light by the corresponding phosphor. The phosphor conversion LED has a simple circuit, low production cost, and good heat dissipation, and is dominant in the current LED product market.
The original site:
http://www.mldrled.com/news/
1. LED base:
The base, also known as the LED support and LED bracket, inside the LED is used for conducting and supporting, which is generally formed by electroplating of the metal material. There are two types of LED base, that is, cup-shaped brackets and flat brackets, which are applied for concentrated-light LEDs and wide-angle LEDs respectively.
2. Sliver glue:
The role of silver glue is to immobilize the chip and conduct electricity. The proportion of the main components is 75-80% for silver powder, 10-15% for EPOXY and 5-10% for additives.
3. Chip:
The chip is a luminescent semiconductor material, generally produced by using GaP, GaAlAs, GaAs, GaN, etc., and its internal structure has unidirectional conductivity. Due to the chip can not emit white light directly, the white light LED is a mixture of a blue-light chip and a yellow phosphor.
4. Bond wire:
The bond wire is a metal wire used to connect the wafer PAD and the holder. In production, gold wires with a purity of 99.99% are generally used, its specifications are 0.9 mils, 1.0 mils, and 1.1 mils etc.
5. Epoxy resin:
The role of the epoxy resin is to protect the internal structure of the LED and slightly change the color, brightness, and beam angle.
6. Phosphor:
At present, most of the white LED light strips, LED bulbs, LED spotlights, etc. are phosphor conversion LEDs, that is, the blue light emitted by the chip is converted into white light by the corresponding phosphor. The phosphor conversion LED has a simple circuit, low production cost, and good heat dissipation, and is dominant in the current LED product market.
The original site:
http://www.mldrled.com/news/
2018年10月4日星期四
The aluminum substrate of LED light strips
Presently, the heat dissipation of LED strips is one of the major issues for LED light strips companies. The aluminum substrate is used to overcome the difficulty, for it has the great thermal conductivity and excellent heat dissipation. The substrate is a unique copper clad laminate with good thermal conductivity, electrical insulation properties, and machinability. The PCB should be mounted close to the metal base as far as possible to lessen the thermal resistance.
Initially, the features of the aluminum PCB.
1. Using surface mount technology (SMT).
2. The particular circuit design is beneficial for heat diffusion.
3. The lower working temperature of LED lights, improve the dependability, as well as increase service life.
4. Decreasing sizes of the product, and costs of hardware and assembly.
5. Having better mechanical durability than other traditional substrates.
The aluminum-based PCB consists of the copper foil, the thermally conductive insulation layer and the metal plate, and its composition is classified into 3 layers:
1. Circuit layer: it is the same as normal copper clad, and its thickness is 1oz to 10oz.
2. Dielectric layer: also known as the insulation layer, is a low thermal resistance material covering on the LED light strip.
3. Base layer: it is a metal board, usually aluminum or copper.
The circuit layer is the printed circuit that used to connected different components. In most cases, the circuit layer needs to have a large current carrying ability, so that the thick copper foil should be utilized.
The heat conductive insulation layer is the key of the aluminum PCB, which has small heat resistance, great viscoelasticity, resistance to heat aging, and can resist physical and thermal stress.
The metal plate is the base of the substrate, which is needed to has great thermal conductivity. In production, aluminum plate and Copper plates are most commonly applied, which suited to traditional machinings including drilling, punching, and cutting etc.
Aluminum PCB materials have advantages that are unmatched by other materials, such as no need for a heat sink, greatly reduced sizes of LED lights, excellent heat dissipation, good insulation, and mechanical properties etc.
Initially, the features of the aluminum PCB.
1. Using surface mount technology (SMT).
2. The particular circuit design is beneficial for heat diffusion.
3. The lower working temperature of LED lights, improve the dependability, as well as increase service life.
4. Decreasing sizes of the product, and costs of hardware and assembly.
5. Having better mechanical durability than other traditional substrates.
The aluminum-based PCB consists of the copper foil, the thermally conductive insulation layer and the metal plate, and its composition is classified into 3 layers:
1. Circuit layer: it is the same as normal copper clad, and its thickness is 1oz to 10oz.
2. Dielectric layer: also known as the insulation layer, is a low thermal resistance material covering on the LED light strip.
3. Base layer: it is a metal board, usually aluminum or copper.
The circuit layer is the printed circuit that used to connected different components. In most cases, the circuit layer needs to have a large current carrying ability, so that the thick copper foil should be utilized.
The heat conductive insulation layer is the key of the aluminum PCB, which has small heat resistance, great viscoelasticity, resistance to heat aging, and can resist physical and thermal stress.
The metal plate is the base of the substrate, which is needed to has great thermal conductivity. In production, aluminum plate and Copper plates are most commonly applied, which suited to traditional machinings including drilling, punching, and cutting etc.
Aluminum PCB materials have advantages that are unmatched by other materials, such as no need for a heat sink, greatly reduced sizes of LED lights, excellent heat dissipation, good insulation, and mechanical properties etc.
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