They are not useless. Plants absorb less green light than other light, but it enables farmers to spend less energy and to more accurately direct light to particular sections of their plants.
In hydroponic systems, the green light that LED grow lights emit can also aid in reducing the growth of algae and enhancing the general aesthetic appeal of plants. Although it is not necessary for photosynthesis, green light can bring out the inherent green hue of leaves and foliage, giving plants a fuller, healthier appearance.
PLUS: Les plantes utilisent-elles la lumière verte?
