Light
Light
What is light?
Light is electromagnetic radiation, a form of radiant energy that propagates through space in the form of waves. The radiant energy associated with these waves exists in small energy packets known as photons.
Light – terminology
When discussing light, various terms are commonly used, such as PAR, PPFD, and DLI.
More light is more yield?
More light generally increases yield, but the type (spectrum) of light also matters because different wavelengths drive photosynthesis with varying efficiency. Red light is most efficient for growth, while blue shapes plant structure and green plays a minor role, so a balanced mix is needed rather than using only red light.