Grow light is an artificial light source, generally an electric light, designed to simulate plant growth by emitting an electromagnetic spectrum appropriate for photosynthesis. Grow lights are used in applications where no naturally occurring light or where supplemental light is required. The presence of light source plays a major role in plants morphology. Plants respond to quality, quantity and direction of light. Light is required in photosynthesis, a plant process of creating food and energy. The sun is the greatest light source for outdoor plants. However substitute lighting can support the growth of plants indoors.