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## Materials of Decoration 5.8.12. High-bay lights - these are used to illuminate spaces with high ceilings, usually ceilings that are above 20 feet in height. Since a high ceiling location has more space to fill, a high-bay by definition is a powerful light source that can brighten up a large area...

## Materials of Decoration 5.8.12. High-bay lights - these are used to illuminate spaces with high ceilings, usually ceilings that are above 20 feet in height. Since a high ceiling location has more space to fill, a high-bay by definition is a powerful light source that can brighten up a large area. Given their placement, they are a natural fit for commercial and industrial uses. They have multiple applications across a range of industries, including workshops, factories, and assembly lines, and they can also be seen in large recreational facilities and gyms. They are excellent for illuminating storage facilities and warehouses as well. One of the benefits of high-bay lighting is that it provides clear, uniform lighting of what’s below it with little glare. 5.8.13. Visual Oddities - usually designed for visual impact rather than the way they distribute light; they provide aesthetic stimulation and amusement. ## Principles of Illumination Illu\-mination is defined as the intensity of light per unit area. This term refers to man-made lighting. And since sunlight is considered perfect and is not included, referring to this term assumes a nighttime condition. Electric illumination - this is essential to provide task lighting giving a concentrated directional light to a specific area. ### Four Factors that Affect Illumination: 1. **Brightness:** is defined as the light emanating from the object being viewed. Also known as luminance, it is the luminous flux or light emitted, transmitted, or reflected from a surface. 2. **Contrast:** this is the difference in brightness between an object and its background. 3. **Glare:** refers to an excessive luminance ration in the field of vision, and is a strong, steady, dazzling light or reflection. 4. **Direct glare:** is an annoying brightness of light in the normal field of vision. 5. **Indirect glare:** this aspect is much more serious and difficult to control. Technically speaking, this type, especially reflected glare, is a glossy object. This basically refers to excessive brightness; either blinding, disabling, or discomforting, in your field of view from reflective surfaces. 6. **Diffuseness:** basically refers to the control of shadows cast by light. It is also further defined as the degree to which light is shadowless. ## Lighting Design This is a combination of applied art and applied science. It is generally known as a fact that no design is the correct one considering the large number of interrelated factors. With this, there are countless number of solutions that will satisfy the minimum requirements of one lighting problem, though some may turn out to be poorly designed while others may show ingenuity and resourcefulness. As a good designer, one should rarely be satisfied with a photocopy of a previous design. Basically, a good design stems from a fusion of a knowledge of current technology and years of background experience. ### Quantity of Light Refers to the amount of illumination or luminous flux per unit area. This is the type that can be measured and easily handled. Simply put, this deals with the number of light fixtures required for a certain area.