A plant growth lamp is an artificial light source, usually an electric light source, intended to stimulate plant growth by emitting an electromagnetic spectrum suitable for photosynthesis. Plant lights are used in applications that do not have natural light or need to fill light. For example, in winter, when possible daylight hours may not be sufficient to achieve the desired plant growth, the lights are used to extend the time the plants receive light. If the plants don't get enough light, they will grow up.
The light that grows either tries to provide a spectrum similar to the sun, or provides a spectrum that is more suitable for the needs of the cultivated plant, the spectrum
. Simulate outdoor conditions from different colors of growth lamps, temperature and spectral output, and change the lumen output (intensity) of the lamp. Depending on the type of plant being cultivated, the stage of cultivation (such as germination/nutrition or flowering/resulting period) and the photoperiod required by the plant, the specific range of the spectrum, the luminous efficiency and the color temperature are all desirable plants and time periods.
In 1868, the Russian botanist Andrei Famintsyn was the first to use artificial light for plant growth and research.
Plant lights are used for indoor gardening, plant reproduction and food production, including indoor hydroponics and aquatic plants. Although most plant lights are used industrially, they can also be used in the home.