Is spectrum control important for greenhouse lighting?

Spectrum control in a greenhouse can be important, especially for certain crops. Generally, the goal is to achieve the desired intensity level, which is the raw power of the light being used. However, different spectra affect plant growth in various ways. Photosynthesis peaks in the red and blue spectra, which is why many LED lights appear purple, as they focus on these peaks. Some crops, like fruit and flowers, benefit from a high red content. In contrast, leafy greens and other crops might thrive better under white light or light with a higher blue content. Additionally, certain crops, such as long-stem flowers, can benefit from far-red light, which promotes elongation.