A closed system of farming wherein a farmer or a farm technician attempts to achieve farm production under regulated conditions which have been created artificially is known as plant factory. Plant factories are generally used for the purpose of growing organic vegetables. This needs artificial control of temperature, light, carbon dioxide and moisture. Grow light is an artificial source of light which are designed to emit electromagnetic spectrum which is suitable for the photosynthesis purpose.

The driving factors for plant factories and grow lights market are the increasing demand for the ability to grow food locally and consistently, paucity of space for farming especially in cities, and the need to increase the yield per unit area without harming the environment. Governments are also encouraging plant factories and grow lights for improving the production.
The opportunities in this market are varied and can range from technological advancement in grow lights, combined use of natural lighting with artificial lighting, developing a solar power based plant factory to constructing multiple level plant factories which would further reduce space requirement.
Some of the major players in this market are APL engineered material, Daystar, Advanced lighting Technologies, Siemens Philips horticulture Lamps, General Electric, Hydrofarm, Iwasaki Electric, Sun System and Taiwan Floriculture Exports Association.