Research on the application of LED plant lighting in aerospace ecological life support system

Establishing a controlled ecological life support system (CELSS) is a fundamental way to solve the problem of long-term manned space life support. The cultivation of higher plants is an important component of CELSS, and one of the keys is light.

Based on the special requirements of the space environment, the light source used in the cultivation of higher plants in space must have the characteristics of high luminous efficiency, output light waves suitable for plant photosynthesis and morphological construction, small size, light weight, long life, high safety and reliability record and no environmental pollution. Compared with other light sources such as cold white fluorescent lamps, high pressure sodium lamps and metal halide lamps, LED plant light can more effectively convert light energy into photosynthetically active radiation; in addition, it has the characteristics of long life, small size, light weight and solid state. Therefore, it has received much attention in ground and space plant cultivation in recent years. Studies have shown that LED plant lighting systems can provide lighting with uniform spectral energy distribution, and its efficiency in converting electrical energy into light required by plants is 520 times higher than that of metal halide lamps.

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