Light fixtures should be adjustable for direction and are typically located in front of the living wall and attached to or suspended from the ceiling. Occasionally, they are located at the bottom or sides of the LiveWall structure, to create proximity to the plants, and thereby provide sufficient light intensity across the entire wall surface. Often times, track lighting is used as it is contemporary, comes with many fixture options, and is relatively inexpensive.
In respect to the light source (bulb), the key considerations are proper light spectrum and light intensity. Plants tend to respond to blue and red wavelengths and in a proportion not available from incandescent or typical office-type LED lights. There are, of course, LED grow lights composed of red and blue diodes—but they tend to cast a purple light which looks odd, unnatural, and unattractive.
For this reason, LiveWall LLC developed the Norb® (Nutri-Orb) Botanic, a specialized White-Light LED that provides the right spectrum for growing plants. With Norb® bulbs, the plants can be healthy and “look right under white.”