Science and technology

Popular Science in plant lighting

Speaking of plant lights, for the majority of Chinese consumers, it is still relatively unfamiliar at the moment. After all, this kind of light is only used at home in some scenes such as plant factories, fruit and vegetable greenhouse planting bases, scientific research laboratories, and abroad, europe, the United States, South Korea, Japan, and so on, has long been a part of indoor gardening, not only can make their own green flowers grow healthily, but also as decorative lighting home.

Traditional plant lighting is actually divided into two parts:

Plant Lighting: mainly play and the sun complementary, regulating the growth of agricultural products role.

Aquarium lighting: mainly in the promotion of the growth of aquatic plants but also play a role in lighting the ornamental.

So what’s with the plant lights?

Plant lamps, as the name suggests, are lamps and lanterns for plants. Plant Lights Mimic the way plants need sunlight for photosynthesis, either by replenishing the light from the plant or by replacing it entirely.

Most of the plants we see, most of them grow in sunlight, so in the dark environment, such as overcast days, indoors, buildings, and so on, the plants will be stunted and even wither, so the researchers tried many times, the different demands of plant on spectrum are summarized, and the corresponding plant lamp is developed according to different growth stages or different demands of plant. In addition, animals also have a need for light, such as far infrared to promote cell regeneration, and then developed physiotherapy lamp, and beauty lovers beauty lamp; according to the habits of insects mosquito lamp, developed mosquito lamp; And we are more common ultraviolet disinfection lamps and so on, these are the spectrum of different and create a functional lamps.

According to the type of light source:

suitable for the light supply of plants are: High Pressure Sodium Lamp, metal halide lamp, ceramic metal halide lamp, microwave sulfur lamp, Plasma Globe Lamp, fluorescent lamp, non-polar lamp and tri-color Rare Earth Supplement lamp, LED plant lamp, etc. , the most commonly used are sodium, metal halide, and LED plant lamps, others are more niche, or very expensive.

As the fourth generation of new lighting source, LED has many different characteristics from other electric light source, which makes it become the first choice of energy-saving and environmental protection light source.

Leds used in plant culture also exhibit the following characteristics: A wide spectrum of wavelengths that coincide with the spectral range established by plant photosynthesis and light forms; and a half-width spectrum, pure monochromatic light and complex spectrum can be obtained according to the need combination; light of specific wavelength can be concentrated and evenly irradiate crops; not only flowering and fruiting of crops can be regulated, but also plant height and plant nutrition can be controlled; The utility model has the advantages of small occupied space, can be used for multi-layer cultivation stereo combination system, low heat load and small production space.

Because of these remarkable characteristics, LED is very suitable for plant cultivation in controlled facility environment, such as plant tissue culture, facility horticulture and factory seedling and aerospace ecological protection system.

What kind of spectrum is suitable for plant growth?

Plants are selective for light, in the visible spectrum (380 ~ 760nm) , the absorption of light energy in plants is about 60% , in which the red orange light with the wavelength of 620 ~ 720nm and the Blue Violet light with the wavelength of 400 ~ 510nm are the absorption peaks. These two bands are called “Light fertilizer”.