Definition - What does Light Intensity mean?
Light intensity refers to the strength or amount of light produced by a specific lamp source. It is the measure of the wavelength-weighted power emitted by a light source.
MaximumYield explains Light Intensity
Light intensity varies depending on the lamp source and there are specific high and low light intensity fixtures, lamps, and bulbs. For example, high intensity discharge lamps emit a high light intensity, while fluorescent lamps are considered a “cool” or low intensity light source.
Different light intensities have specific uses when it comes to horticulture. For example, young plants require cooler light intensities than vegetative and blooming plants. In addition, indoor growing requires a higher intensity of light in general, because, unlike a greenhouse, there isn’t any natural light source coming in, and the intensity of the lamp(s) has to compensate for that.
Meanwhile, lower light intensity is more desirable when artificial lighting is not the primary lighting source.