High power LED grow lights are used to grow plants in commercial indoor farms where plants are typically grown in a single layer on the floor under high intensity toplighting with no sunlight. In lockstep with the increased industrial interest in growing high value crops as well as consumer needs for fresher, healthier, tastier, and more sustainable foods, indoor farming has gained serious traction and been witnessing significant adoption across the globe. Sole-source indoor farms provide a totally controlled growth environment where artificial light is the sole source of irradiation and growers have more control over temperature, humidity, CO2, water, nutrients, pH, and other factors that influence plant growth. Indoor farms also include vertical farms. These indoor grow facilities are designed for multilayer plant production. High intensity sole-source indoor farms separate the influence of natural daylight to the growth of plants and rely solely on electric lighting to orchestrate and manipulate the growth and development stages of plants. The indoor horticulture lighting systems should deliver an adequate amount of irradiance in the wavelengths useful for the specific species of plant being grown.