Definition - What does Red Light mean?
A red light is a plant grow light that appears red in color and has a wavelength of 600 – 700 nanometers (nm). These lights are often used for indoor growing, particularly for flowering plants.
MaximumYield explains Red Light
Light is exceedingly important in the life of a plant as it helps a plant to produce chlorophyll and undergo photosynthesis. Although outdoor plants normally receive natural light across the entire light spectrum, plants that are grown indoors can sometimes receive an insufficient amount of a necessary light wavelength. Many indoor gardeners use grow lamps to supplement the light their plants receive.
The light spectrum emitted by the sun, particularly the visible light spectrum, emits light in seven different colors (red, orange, yellow, green, blue, indigo, violet). Colors on the far ends of this spectrum play a key role in the health and propagation of plants. For example, blue light directly affects chlorophyll production, so plants that are grown under blue lights will have strong leaves and stems. On the other hand, red light is responsible for flower and fruit production, and is also very important in the early life of a plant for seed and root growth.