Making daylight Artificial daylight replicates the natural effects of sunlight using a man-made light source—it looks and feels like the real thing. Natural sunlight contains colours across the entire visible spectrum. It tends to be much whiter than conventional artificial light, the composition of which may be missing certain wavelengths or contain too much red, green or blue light. Matching the chromaticity, or colourfulness, of sunlight is the starting point for any artificial daylight system. The technologies that contribute to Virtual Daylight® Light is radiated energy, and harnessing and controlling the frequency and intensity of this energy to create a natural light involves a number of technologies. How these technologies are used will affect the properties of the artificial light. Colour temperature Colour temperature refers to the appearance of a light source. As colour temperature varies, so does the relative power of the constituent wavelengths. Power distribution across the spectrum moves towards blue at hotter temperatures—the sun is 5800K on the surface. Daylight lamps have a high colour temperature, in excess of 6000K (correlated colour temperature) and a minimum Colour Rendering Index (CRI) of 80. CRI rates lamps on a scale of 0 to 100, where daylight is 100. Clearvision offers products with colour temperatures ranging from 5300K to 7000K. Steady state Clearvision’s steady-state lighting uses high-frequency gear to remove the flicker and hum associated with the magnetic ballasts that control the lamps. Polarisation The polarising lens is an important feature of Clearvision’s range of luminaires. It removes the glare from the high-brightness light source and delivers additional benefits too, such as improved visual acuity and brighter walls and ceilings. Most significantly, because natural sunlight is partially polarised by the earth’s atmosphere, the polarising lens recreates this effect to achieve a more natural-looking light. Diffusion Diffusion ensures that rather than seeing a bright point of light, such as the lamp itself, light is distributed evenly across an entire surface. This is, of course, similar to the effect that the atmosphere and cloud has on sunlight. Clearvision provides diffusion options and also spreader lenses, which can be used to further disguise the light source. Colour and intensity We can change the colour and intensity of artificial daylight to suit almost any conditions. The appropriate balance can be selected according to ergonomic, aesthetic, or atmospheric criteria. Changes can happen automatically using dynamic-control equipment that monitors and responds to external lighting conditions or operates according to pre-programmed information. Concept technology Lighting technology continues to advance and Clearvision is evolving its product range and technology to give customers more choice. Here’s a snapshot of things we are working on: Lenses As light sources become more efficient and powerful, there is greater potential for glare. Lenses are, therefore, essential in modern-day lighting products to control distribution, shield the source, improve quality and make the fitting more attractive. Clearvision already manufactures polarising and spreader lenses, and is developing new lens types to enhance the range. Juice Juice is the award-winning multi-luminaire ballast technology from Juice Technology Ltd that eliminates the need for a ballast in each discharge luminaire. Clearvision has developed a new range of luminaires that incorporate Juice to reduce power consumption and maintenance costs over the life of the system. Control The trend is for lighting that is more flexible and responsive, and this implies control. At Clearvision, we push the technology to create controlled-lighting solutions that adapt to changing conditions or behave in accordance with pre-programmed instructions. In addition, we offer consulting services to bring clarity to performance and protocol requirements, ensuring that customers’ expectations are met. Ergonomics It is now widely accepted that ergonomic lighting reduces fatigue and discomfort, and maximises productivity. To achieve its full potential, however, lighting must be considered early in the planning phase of a project. Clearvision continues to develop its expertise in both ergonomics and lighting and provides advice and consultancy as part of its project-support and project-management services. Total cost of ownership The capital investment in lighting equipment is not the whole story. Power consumption, maintenance and replacement luminaires make up the greater portion of the total cost of ownership. We are incorporating new ballast technology and long-life luminaires into the Clearvision range to increase our ability to meet budget pressures and ensure that our products look great and last a long time.

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