In order to solve the problem of insufficient light for greenhouse crops, incandescent lamps, fluorescent lamps, high-pressure sodium lamps and emerging LED grow lights have been successfully applied in greenhouse fill light.
First, incandescent lamps.
Incandescent lamps belong to the first generation of electric light sources, because of their high heat and lack of the red and blue spectrum required for photosynthesis of plants, so they are not suitable for the field of plant lighting.
Second, fluorescent lamps
Fluorescent lamps, that is, low-pressure mercury lamps, which are often referred to as fluorescent lamps, belong to the second generation of light sources. Fluorescent lamps designed according to the photosynthesis and chlorophyll absorption lines required for plant growth mainly rely on discharge to generate ultraviolet rays to excite phosphors to emit blue and red spectral lines to promote plant growth. For a long time, fluorescent growth lights have been inefficient; Solid mercury containing heavy metals, etc., which is easy to cause secondary pollution to the environment; large and bulky; The lack of red light spectrum required by plants is generally used at the seedling stage of plants.
Third, high-pressure sodium lamp
High-pressure sodium lamps belong to the third generation of lighting sources, which are composed of mercury, sodium, glass shell, xenon arc tube wick, degassing agent lamp head, ballast, etc. Its spectral energy distribution is roughly red-orange light, yellow-green light, blue-violet light; The angle of illumination is 360°, and a reflector needs to be installed to let the light shine into the designated area; High luminous efficiency and strong penetrating ability; It belongs to the heat light source, in the process of filling the light, it will be accompanied by the generation of heat, and close exposure will burn the plant; poor lighting continuity; Contains toxic metal mercury, low safety, but because of the moderate price, is accepted by the majority of users.
Fourth, LED grow lights
As the fourth generation of semiconductor light source, LED is mainly composed of light distribution system, heat dissipation system, drive circuit, etc. Its luminous angle is divided into ≤180°, 180°~300° and ≥300°, we can provide a variety of light-emitting angle plant grow lights through scientific light distribution design; It can emit monochromatic light with narrow light waves, such as red, green, blue, orange, etc., according to the needs of plant growth, it can provide different light formulas of full spectrum and red and blue spectrum like sunlight; LED adopts solid semiconductor chip as luminescent material, small light decay, energy saving, long life; As a solid-state light source, the fill light irradiation is not accompanied by heat radiation, and the LED grow light does not have to worry about plant burns.
Compared with the previous three lights, LED grow lights are more powerful and are an important guarantee for efficient production in modern agriculture. It can improve the yield and quality of your greenhouse crops, reasonably control the planting cycle, and achieve good economic benefits. Shenzhen LEDZEAL, which has been deeply engaged in the field of LED lighting for many years, can provide you with one-stop plant lighting solutions.
Post time: Oct-20-2022