Applying LED plant grow lights on the vegetable seedling

LED source of light control vegies morphogenesis and growth is a vital technology in greenhouse planting. The plant can perception and assimilate light through photoreceptor systems. After that, transported to control morphological changes by intracellular messengers. Photomorphogenesis is counted on light to regulate the differentiation, structure, functionality and the production of tissues and organs.

Plant seedlings are a significant portion of facility agriculture. Uninterrupted drizzly weather conditions lead to lack of light and unnecessary growth, that will affect the growth of greens, bloom bud differentiation, and fruits improvement, and finally influence the yield and quality. A number of plant growth regulators are accustomed to managing the growth of seedlings on stream, however, the false usage will cause toxic contamination.

LED plant grow lights have several positive aspects in the supplement of light, it can be an achievable method to increase seedlings. Based on the experimental information, in the low light environment, the green light LED grow lights can accelerate the growth of cucumber seedlings. In contrast to the low light, the red and blue light improved healthy index 151.26% and 237.98% correspondingly. Furthermore, compared to single color light, the healthy index enhanced by 304.46% by the used composite light of red and blue light. Red light can boost the amount of leaf, dry and fresh quality, leaf area, stem dimension, plant height, healthy index, SOD activity, root activity and soluble protein content of cucumber seedlings.

In comparison with natural light, LED red light and blue light can highly raise the leaf area, dry matter quantity and a healthy index of tomato seedlings. LED green light can truly enhance the biomass of cucumber and tomato seedlings, and the health index, stem diameter, and fresh-dry quantity of seedlings with the enlargement of green light intensity. LED red and blue mixed light can improve the stem diameter, leaf area, plant dry weight, root-shoot ratio, and healthy index of eggplant.

The above shows the benefits of vegetable seedlings cultivated by applying LED grow lights are very noticeable.

The secrets of LED lights' Color Temperature

Heating an ideal blackbody, when the temperature continues rising, the color of blackbody starts to change from red to blue progressively. If the color of a LED and blackbody is the same, we utilize the value of temperature at this time to symbolize the color temperature of the light source.
Because the CCT (correlated color temperature) is not really an equivalent color, but an assessed value of the performance of the LED when the LED color approaches the blackbody color. That is why two different type LEDs have the same CCT may still look like differences in the appearance of light color. In addition, there is no essential relationship between CCT and CRI (color rendering index). It's improper to evaluate the color rendering ability of LED lights simply by color temperature.
In the industry of the white-light illumination, most suppliers divide the white light into warm white, white and cool white based on the feeling of humans.
When the CCT is under 4000K, this reddish light is called warm white, for it gives people a warm, comfortable feeling. The second part, it goes up to the interval of 4000K to 6500K. People have no specific feeling about this color in visual and emotion, so the CCT in this range is called neutral light or white. As soon as the color temperature is higher than 6500K, the light will turn blue gradually and creates a cold atmosphere, so it is named cool white.

Moreover, people's sense is as well affected by the brightness. The dimmed cool white light will give people a feeling of dismal. Likewise, the warm white light with excessive brightness will make people feel muggy. 
Consequently, it is important to customize different LED lights based on various purposes and customers, in order to correspond with market trends. We, MLDR, the China LED strips supplier are able to manufacture all types of LED light strips and offer wholesale, customized, OEM, ODM services.

The causes of LED light decay

LED light decay means that after a long time of use, the brightness of LED lights will have different degrees of dimming, which is the light decay of the LED lights.

Today, the LED lighting made by diverse LED suppliers will have different light decay. Even high-power LEDs have light decay that has an inseparable relationship with working temperature. It is decided by chip, phosphor and packaging technology. Nowadays, the lumens decline of LED lights is one of the hot concerns for the LED light industry. There are 2 key reasons for the light decay of LEDs:

First of all, the quality of LED lights:
1. A few LED lights manufacturers select the low quality LED chip to cut the cost, which makes the lumination of such lights are attenuated faster.
2. The producing technique is flawed, the heat made by the LED chip's working can't be released from the PIN efficiently, which bring about the overtemperature and light decay.

Secondly, the working conditions:
1. The LED is ordered to be driven by a constant current. However, in practical use, many customers will use voltage driven that cause the LED decay to increase.
2. The actual input current is higher than the rated current of LEDs.

Actually, there are lots of causes of the light decay of LED lights. The foremost crucial problem is the efficiency of heat dissipation. Many LED lighting suppliers do not focus on the heat dissipation of their lights, the light decay of these LED lights will over others with the well cooling design after a long period of use. The heat resistance of the chip, the cooling effect of the PCB, the base, the colloid, the gold wire, and other materials are also associated with the light decay of LEDs.

At present, the LED lighting market is paying more and more attention to the quality of LED lights. As the LED light strips and LED plant grow lights supplier in China, we also use the mature manufacturing technology and select excellent raw materials to guarantee the reliable quality of our products.

What do these numbers on the LED lights mean?

When choose and buy LED lights, we are able to frequently notice some numbers from the product information like 2835, 3528, 5630, 5050 etc. What do all these numbers signify? What are the differences between them?

Actually, all these numbers are utilized to point out the dimensions of SMD LEDs that usually mounted on the LED strips, LED tapes, TV backlights, LED bulbs and other LED products. One example is 2835 means the length of the SMD2835 LED is 2.8mm and the width is 3.5mm. But it is necessary to underline that all these are the metric unit. The following is specific explanations:

3528: the dimensions of SMD3528 LED is 3.5*2.8*1.9mm, the last number 1.9mm is the value of thickness. Generally, the operating current of SMD3528 LEDs is 20mA, and the maximum is 40mA. In addition, 3528 also called as 1210 in countries and regions where British unit is used.

2835: the size is 3*1.4*0.8mm. It is possible to mix up 2835 and 3528, for they are really similar and their PCB is normally universal. Compare with SMD3528LEDs, SMD2835 LEDs have higher brightness, better heat dissipation, as well as cheaper. Consequently, SMD2835 LEDs are occupying a huge market share nowadays.

5050: The size is 5*5*1.6mm. The workmanship of SMD5050 LED is excellent, for an SMD5050 LED has 3 chips. Based on this feature, producers install 3 chips of various colours are red, green and blue respectively in a LED. And then, we are able to realize change colours by control the current of different chips, which is the RGB LED.

5630: The size is 5.6*3*0.9mm. The SMD5630 LED has high lumination, even light, low light decay, and long lifetime. According to the power of, SMD5630 LEDs are usually categorized as 0.2W, 0.3W and 0.5W, of which a 0.5W SMD5630 LED can reach 60lm.

SMD LEDs

There are still have a large amount of SMD LED with other sizes like 3030, 4014, 7030, 8520 etc. Nowadays we should know that all these numbers are the size of SMD LEDs. LED lights suppliers will pick suitable LEDs depending on the various demands of customers. For example, as the LED tapes manufacturer, we will select 0.5W SMD5630 LED when some clients asked for high brightness. But if some demand the even light and higher CRI, the SMD2835 LED certainly is the better choice.

For more information about specifications of LEDs, please read another post that talks about common specifications of LEDs. The web link is as follow:

Let you know the LED specifications and parameters in three minutes.

Let you know the LED specifications and parameters in three minutes

The LED is one of the solid-state semiconductor devices that transform electric power into light. As the most common source of light, do you know the specifications of SMD LEDs? In this post, we intend to introduce a number of usual specifications of SMD LEDs as well as its meaning.

SMD5630 LEDs

1. Voltage: the SMD LED utilizes a low voltage power. The one LED input voltage is between 2 to 4V. Take the LED flexible strip RU5630G as an example, its 3 SMD5630 LEDs and 1 resistor connected in series as a group, using 12V input voltage. This kind of LED lighting with low voltage design is actually safer and is especially suited to public places.

2. Current: the rated current of SMD LED differs based on the power. Generally, the illumination of LEDs will go up along with the increase of current in a certain range.

3. Power: the normal SMD LED rated power is 0.2W, 0.5W, 1W and 1.5W etc .

4. Color temperature: White LEDs are divided into warm white (2700-4000K), white (5500-6000K), cool white (7000K or more). Red, blue and green is denoted with the optical band: Red (600nm-680nm), Green (500nm-580nm), Blue (430nm-480nm).

5. Beam angle: the commonest beam angle of SMD LED is 120 degrees. In most cases, LED strips suppliers changes the beam angle by mounting the lens on the LED light strips. Such as the MFS3030A LED curtain light's beam angle is increased to 175 degrees by installing the PMMA lens on it.

6. Luminous flux: commonly, the higher power of LED implies the higher brightness. For example, the SMD2835 LED of 0.2W is about 24lm, the SMD5630 LED of 0.5W can attain 60lm, and also the SMD3030 LED of lattice curtain light can attain 150lm.

7. CRI: its complete name is Color Rendition Index, representing the capability to restore the object color, and the highest value is Ra100. For a more specific explanation of CRI, please refer to another article: Full-spectrum LEDs, the healthy lighting.

If you want to get more information on LED lighting, please bookmark our website: www.mldrled.com. We are the professional LED strip lights and LED grow lights manufacturer in China, and will update the latest products and articles on this website regularly.

The differences between rigid and flexible LED strips

With the improvement of LED light technologies, LED light products have become the leader in the illumination market, because of its eco-friendly, energy-efficient, multipurpose and cost-effective. Numerous places across the world have progressively replaced traditional lights with LED lights. As the experienced supplier in China, we will provide you with a simple summary of LED strip lights, hoping that'll be useful to you.

LED light strips including flexible LED strips and rigid LED strips.

Firstly, flexible LED strips, also called LED tapes or LED ribbon, which manufactured by mounting the LED on the FPCB, and its thickness of the flexible LED strip is merely about 1mm. LED flexible strips are soft and coated with double-sided adhesive on the backside, convenient for installation in corners, rounded and abnormal areas. Moreover, the majority of the LED strips can be changed the length by cutting and lengthening. Applications of LED tapes are as follow.

1. The building shape lighting.

2. The decoration of the irregular object, like the irregular wall and the ceiling in hotels, clubs and KTVs etc.

3. Indoor decorative lighting, such as the doorframe, counter and cabinet etc.

4. Vehicle decorations.

5. Showcase and others.

Another one, rigid LED strip lights or LED hard strip lights. The only difference between the flexible and the rigid is that the hard strip light utilizes the rigid PCB with the material of aluminum or fiberglass. The strengths of LED rigid light strips are that it is easy to fix and install, the length can be customized based on usage requirements, and it has the higher heat-dissipation effect. The shortcomings are it can't be bent freely. Not suited to irregular places. Widely used in Jewelry showcase lighting, cabinet lighting, wardrobe lighting, store decoration lighting, art lighting, lightbox lighting, and house decoration lighting.

The most widespread on the market today are 12V and 24V LED strip light that is harmless to people. Definitely, there'll be covered by plastic profiles or tubes if the input voltage is AC 110V, AC 120V and AC 220V etc, for enhancing the safety performance of high-voltage LED strip lights. The ordinary lifespan is over 30,000 hours and the operating temperature is -30°C to 60°C. Categorized by colors, LED lights are usually separated into single color and RGB. The single color LED strips including red, green, blue, cool white, white, natural white, warm white. The RGB LED strips are color changeable by controlling 3 chips with different colors. There are also various other light strips available on the market, like RGBW, three-colors and so on.

In the above introduction, I think that everyone has an over-all idea of LED lights.

Nowadays, LED lighting suppliers not just simply concentrating on lighting efficiency or product lifespan, and also more attentive of people's perception and the effect of light on consumers, dedicated to producing man-made light nearer to normal daylight. Along with the improvement and maturity of the LED technology, full-spectrum LEDs have grown to be the hot zone in the field, which is resemble the sunlight spectrum.
During the sunny daytime, the sun sends out a continuous spectrum of light, as well as its colour temperature is 5000K to 5500K. The value of CRI (colour rendering index) symbolizes the capability of the source of light to redisplay the colour of the object. Fifteen types of sample colours, R1 to R15 were utilized to appraise the colour rendering of the source of light. R9 is utilized to judge the redisplay quality of the brilliant red. The CRI of sunshine is identified as Ra 100. The full-spectrum including the spectrum of ultraviolet light, visible light and infrared light, of which the proportion of the visible light part resembles the daylight, as well as the CRI is near to Ra 100.

The parameter of R2835FS LED tapes

Above is the spectrum of 2835 full-spectrum Led strip lights Art. No. R2835FS. From that, we are able to know the Ra and R9 of the full-spectrum LED strips is 98.0 and 99 correspondingly, meaning the superior quality. The LED strips, with the broader colour range, not only make the colour of the item appear much more authentic, but also successfully decreases the risk of blue light.
In accordance with market data, the actual percentage of full-spectrum LEDs in the LED industry is also tiny. In contrast to normal LEDs, the price of full-spectrum LEDs is actually a bit higher.
Business insiders anticipate, with the steady development of full-spectrum technologies, far more customers will certainly understand the significance of full-spectrum light quality, as well as its business will increase quickly. The whole LED market, mainly indoor illumination will change from traditional high colour rendering LEDs to full spectrum LEDs.