What knowledge should be paid attention to when choosing plant lights and installation?

plant light is a light fixture that uses the principle of plant photosynthesis to supplement light for plants. It can be used to extend plant light, as a supplement in rainy weather, in conditions lacking natural light, or as a complete replacement for natural light in greenhouses. Common plant lights include incandescent , fluorescent lights, HID lights, and LED lights.

The selection and installation of plant lights requires certain expertise. First of all, plants need a certain light intensity and reach the light compensation point to grow normally. If the intensity does not reach the light compensation point, it will not work for plant growth, which is why some people say that plant lights are useless. When the light reaches the light saturation point, the accumulated substances in photosynthesis will no longer increase, and even the phenomenon of photoinhibition will occur beyond the light saturation point. Generally, it is difficult for plant lights to reach the light saturation point. If the intensity exceeds the compensation point, it will inevitably cause waste, even inhibit growth, burn leaves, and play a negative role. The light compensation point and light saturation point of various plants are different, so it is necessary to choose a lamp with an appropriate light intensity according to the type of plant.

It is worth noting that the unit of plant light intensity is PPDF, which is the effective light intensity per unit area, and cannot be directly interchanged with the normal light unit lux. Because the light contains bands that are useless for photosynthesis. The effective light intensity of the plant light is not only related to the light intensity and spectral range of the plant light, but also to the hanging height and light area. Be sure to consult the manufacturer or reference manual.

Another important parameter about plant lights is the spectral range. In general, the red and blue bands are the most effective for plant photosynthesis. The blue band is conducive to the growth of plant stems and leaves, and the red band is conducive to the flowering and fruiting of plants.

UV band:

200-280nm: UVC band, which seriously damages the normal growth of plants, but can be used for sterilization.

280-315nm: UVB band, can make plants aging, dwarf, improve plant resistance,Prevent plants from growing too large.

315-380nm: UVA band, often used for coloring succulents, making the color of succulent leaves beautiful.

Visible band:

380-400nm: purple light, less absorption by plants

400-520nm: including violet light, blue light , bright green light. The absorption of chlorophyll in this band is strong, which can promote photosynthesis and promote the growth of stems and leaves. A single blue light exposure can cause leggy.

520-610nm: including orange light, yellow light and green light. Chlorophyll and carotenoid both absorb weakly in this band and promote less photosynthesis.

610-720nm: red light, which has a greater impact on photosynthesis. Chlorophyll has the strongest absorption capacity in this band, which greatly promotes photosynthesis and promotes flowering and fruiting of plants.

Infrared band:

720-1000nm: near-infrared band, has a slight effect on plant flowering and germination

above 1000nm: far-infrared band, mostly released as heat energy, has no practical effect on plants.

This is the general effect of the wavelength band on the growth of plants. It is necessary to choose a plant lamp with a suitable spectral ratio for different plant species. It is worth noting that the human eye cannot directly perceive the spectral ratio, resulting in There are many fakes, it is best to buy them from regular manufacturers when choosing.

In addition, the illumination uniformity of the plant light is also very important. Another problem is the heating problem of plant lamps, such as incandescent lamps and high-pressure sodium lamps. There is also a layer of reflective material, which is conducive to improving the utilization rate of light by plants, and the coloring of succulent leaves will be more uniform. There are also power, luminous efficiency, price, and lifespan are also very important, so I won't introduce too much here. Weizhaoye Optoelectronics-LED Plant Light/LED Plant Growth Light/Full Spectrum Plant Fill Light/Plant Lighting Project/LED Plant Growth Light Manufacturer