In recent years, LED lights have been widely used in greenhouses for supplemental light. But there are many details to be paid attention to during the use process. Do you know how do you use the fill light in the greenhouse? Here are some notes about the use of fill light in the greenhouse.
LED light height is flexible
In normal, the fill light with a large illumination range is far away from the vegetable, and the height is kept at a distance of 1.5-2 meters from the growth point.
The fill light with a small illumination range is generally installed at a distance of 0.5-1.5 meters above the growth point of the vegetable.
If it is a simple fill light, it can be slightly closer to the growth point of the vegetable.
If it is a light fixture with both lights filling effect and warming effect, it needs to keep a certain distance from the vegetable growth point to avoid damage to vegetables too close.
If the distance is too far, the fill light will be reduced. This distance is also subject to flexible adjustments depending on the growth height of the vegetables.
Therefore, when installing the fill light, it is best to use a pulley to hoist it, so that the rope can be disassembled to adjust the distance.
The supplement light time should be flexible
The fill time of the fill light is not fixed, and it needs to be flexibly adjusted according to the demand of the light intensity of the vegetables.
Due to the different origins of vegetables and different climate adaptability, the requirements for the length of light are different. They can be divided into three categories: long-day vegetables, short-day vegetables, Chinese-Japanese vegetables.
Under natural light, the longer the sunshine time, the stronger the fertility, the better the flower bud quality, the flowering period is advanced, and the yield is high.
The sunshine time is shortened, the growth and development are poor, the growth is weak, the flower bud differentiation is delayed, the flowering rate is high, and the fruit is poorly developed.
According to the above growth habits, the illumination can be enhanced at any time of the day, and the effective illumination time can be prolonged.
When the length of the cloudy or winter sunshine is insufficient and the intensity is insufficient, so as to maximize the photosynthesis.
Eggplant requires higher light intensity and length. The light saturation point is 40,000 to 50,000 lux, and the light compensation point is 2000 lux.
The daily sunshine hours are 12 to 14 hours, and the light intensity of 40,000 to 50,000 lux is the ideal lighting condition for tomatoes. If the light is weaker than 1.3 lux, the flower bud differentiation is greatly delayed.
Even if the nitrogen fertilizer is added, the influence of such weak light cannot be overcome, and it is easy to fall. Tomatoes are not strict with the length of light and increase the photosynthesis time, which is beneficial to the formation of flower buds and the growth of plants.
According to the data, on a cloudy day, the yield of cucumber can be reduced by one-third after one day. After several cloudy days, the yield is almost no.
If the cloudy time is too long, it will bring serious consequences to cucumber production.
Cucumber is beneficial to female flower differentiation under short daylight conditions.
Therefore, in the daytime, when the light intensity is relatively weak, the corresponding fill light can be performed, thereby improving photosynthesis and increasing the yield.
But be careful not to extend the length of the light indefinitely, so as not to affect the yield only if it is not long.
Pay attention to the greenhouse moisture
Because the humidity in the greenhouse is higher than the outside, when the fill light is selected, the moisture of the lamp should be protected to extend the service life of the filled lamp.
It can seal the luminaire or choose a fill light with good waterproof and moisture resistance. Of course, not only the lamps should be well protected from moisture, but also the wire connectors and lamp holders and switches used to fill the light in the shed should be protected from moisture.
In addition, in order to improve the light-filling effect, a reflective film can be laid on the ground to improve the light-filling effect of the middle and lower blades.
Need LED lights to supplement the light in the greenhouse? Please feel free to contact us. We vanqled.com also accept LED light customization services.