Many people wonder what the difference is between regular lighting and lighting that stimulates plant growth. Although many similar principles apply to general lighting and horticultural lighting, there are very distinct differences. General lighting is heavily biased towards the human vision response and is measured in Lumens. Lighting used to grow plants should be measured with metrics that rate the usefulness of the system to stimulate photosynthesis. Photosynthesis is when green plants convert water and carbon dioxide into oxygen and usable energy in the form of sugars.
LED lighting can be designed to optimize the amount of useable light per space. It is easy to manipulate to allow only the light omitted from the fixture to be in the wavelength that stimulates photosynthesis. This equates to 400 to 700 nanometers which delivers the greatest yield per watt or amount of energy consumed.
For more great information on the difference between general lighting and horticultural lighting, check out this video from Illumitex, one of our indoor grow light manufacturers.