Light is critical for plant growth. Through a process called photosynthesis, plants absorb light and use that to convert water and carbon dioxide into glucose, which is used later on as energy for other cellular processes. The sun is the best known source of light for plant growth. But beginning around the year 1860, it was found that artificial lighting can also provide plants the needed light in order for them to grow. This led to the development of what is known today as grow light, which made use of conventional electric lighting types such as high-intensity discharge lights, plasma […]