Another article in the March issue of The Electrical Distributor introduced lighting design. Reprinted with permission. It is often said that lighting is both an art and a project, but the art of design can be boiled down to many guiding principles. By understanding these principles, electrical distributors demonstrate experience and stand out. They can engage owners in the conversation from the beginning of application requirements to the end of equipment sales.
A lamp is a commodity that must be purchased at the lowest possible cost, but a lamp is a commercial asset that must be carefully considered to invest in the correct design and equipment. Most of our impressions of the world are produced through our eyes, and light is necessary for vision. Therefore, light is the medium through which most people perceive the world. "Lighting" is the application of light to space. The placement, relative intensity and direction of light will not only have a significant impact on vision and visual comfort, but also have a significant impact on perception. Not only lighting, but also the lighting equipment itself will affect the impression of the space and its owner.
Therefore, lighting affects satisfaction, visibility, task performance, safety, sales, mood and atmosphere, aesthetic judgment, and social interaction. It also tells a story about space, if a store might focus on discounts or high-end products, or whether a restaurant sells fast food or an exquisite dining experience. Color perception: For an object to be perceived as a certain color, the color must exist in both the object and the content of the light shining on it. Designers care about the appearance of colors (measured by correlated color temperature or CCT) and color fidelity, or color reproduction compared to ideal sources (measured by color rendering index or CRI). The lighting industry is now also evaluating a proposed measure of saturation. Changing CCT, CRI, and saturation can have a major impact on the appearance of people, objects, and spaces, enhancing or suppressing or even distorting their colors. Focus: The human eye will naturally be attracted to the brightest area in the field of view. By focusing more intense light on certain features of the space, we can turn them into focal points, focus attention on them, and establish visual hierarchy. For example, we can promote it by focusing higher intensity light on a key merchandise display. Spatial perception: Light patterns in space can stimulate psychological reactions (see table). For example, even and bright lighting, by placing lights on the walls or even on the ceilings, can make the room space appear public and visually larger. In contrast, using low-intensity lighting with a small amount of peripheral lighting on the task can create a sense of intimacy in high-end restaurants.
Appropriate lighting of a space usually involves overlapping general/ambient, task and accent lighting. General lighting-This main layer provides sufficient light for visual tasks, ambient light for safe movement, or both. It is usually provided by the air team. General lighting is usually diffuse and uniform. General lighting is usually classified into one of three categories based on its light output: direct, indirect, or some combination of the two. direct lighting distributes all or most of the light down to the task. Depending on the optics used, light can be concentrated or dispersed. It is very effective, but there is a risk of direct glare, fanning of nearby walls, and obvious shadows. Indirect lighting distributes all or most of the light upwards to the ceiling and nearby walls, and then reflects back to the work area. Indirect lighting provides a very soft light distribution, which can improve visual comfort, but there is a risk of making the space appear visually flat.