How are orchids cared for using artificial lighting?

Sunlight is essential for plant photosynthesis and is the energy source for producing nutrients.Orchidsphotosynthesize as follows: the roots absorb nutrients and water from the growing medium, the leaves absorb carbon dioxide from the air, and their chlorophyll absorbs sunlight (light energy), synthesizing carbohydrates within the plant body; light energy is converted into chemical energy and oxygen is released. This cycle continues endlessly, enabling theorchidplant to develop and grow, produce new growths, while old growths age and die, metabolism and renewal continuing without end, so that life continues and the species reproduces.

Orchids are semi-shade plants; they love sunlight but dislike being scorched by direct exposure. In practice, it has been found that orchids have a saturation point for light requirements. Once light reaches the saturation point, even better sunlight has no effect on orchids. According to professional testing, orchids growing wellhave alight intensity of 4000——5000Lux (lux, the unit of light intensity), at which their germination rate, flowering rate, leaves and leaf color are all at their best.

Sunlight is a collection of continuous wavebands of light from red to violet, and artificially simulating the plant's growing environment should also start from this. A full-spectrum artificial light would of course be best, but the vast majority of artificial light sources cannot meet this requirement. Plants absorb red and blue light most easily, and a balance of red and blue light is especially important for photosynthesis. Experiments have proven that red light promotes the growth of orchids, while blue light is indispensable for thickening leaves, accelerating plant development, and regulating stomatal opening. Green light should not be ignored either, as it can promote the growth of oxygen, thereby helping orchids better store nutrients. In addition, a certain intensity of long-wave ultraviolet light is also indispensable, as it helps form anthocyanins and inhibit the elongation of branches and leaves.