What kind of lights are generally used for plant supplemental lighting
In the current boom of indoor planting and facility agriculture, the scientific selection of plant supplemental lighting equipment has become a key factor in improving planting efficiency. Lamps with different spectral characteristics and energy consumption performance directly affect the photosynthetic efficiency and growth cycle of plants. This article will systematically analyze the technical characteristics of mainstream supplemental lighting equipment, providing professional selection basis for growers.
Technical characteristics of LED plant lights
Advantages of spectral customization
By adjusting the ratio of red and blue light, it can accurately match the needs of different growth stages. The latest full-spectrum LED has achieved 90% simulation of sunlight, with an increase of 35% in the yield of economic crops such as strawberries.
Analysis of energy-saving performance
Compared with traditional lamps, it saves more than 50% of energy, and the light efficiency index of 1.8μmol/J is significantly better than the industry standard. Experimental data show that a 50W LED light group can meet the lighting needs of 3㎡ leafy vegetable planting.
Application scenarios of high-intensity discharge lamps
Small sun supplemental lighting system
A light intensity output of 2000μmol/m²/s is suitable for strong light plants such as succulents, but it needs to be combined with a shading system to prevent burns. It is recommended to keep the installation height above 1.2 meters, and control the daily supplemental lighting time within 4 hours.
Rare earth gas discharge lamp
Sodium thallium indium metal halide lamps have a color rendering index greater than 85, especially suitable for tissue culture laboratories. But pay attention to the fact that the 6000K color temperature version is more suitable for the vegetative growth stage.
Technological iteration of fluorescent light sources
Innovation of three-primary-color lamps
The light efficiency of T5HO high output type is increased to 104lm/W, and the PPFD can be increased by 40% with the help of a reflector. It is recommended for low-light scenes such as seedling cultivation.
Cold cathode fluorescence technology
The starting voltage is as low as 300V, and the service life is extended to 30000 hours. The compact design is suitable for interlayer supplemental lighting in three-dimensional cultivation shelves.
The selection of plant supplemental lighting systems needs to consider the spectral adaptability, energy consumption economy, and spatial applicability comprehensively. It is recommended that large-scale planting adopt LED matrix systems, and full-spectrum panel lights are the best choice for home gardening. Regularly using a PAR meter to detect light intensity distribution and dynamically adjusting the supplemental lighting strategy combined with the DLI value can maximize the utilization efficiency of lighting.