Daylighting

Daylighting: The Most Successful Strategy of Saving Energy and Costs

Before the invention of electric lights, buildings were specially designed in ways to facilitate sunlight penetration into the interior spaces. Despite the long history of utilizing the daylighting strategy of illuminating rooms, architects and lighting designers are just beginning to appreciate its usage as a 'green' device.

The Concept of Daylighting

Daylighting does not simply refer to the practice of placing openings, windows and reflective surfaces to facilitate effective internal lighting during the daytime. The concept is to admit natural light by directing and distributing the light rays through the space to achieve uniform lighting, prevent glare and reflections, as well as save energy and costs associated with high electricity bills.

Daylight is extremely bright and works wonders in terms of the amount of light needed within a built environment. For this reason, small apertures in walls and roofs adequately meet daylighting goals.

This technique works perfectly as a task-ambient lighting design, where daylight is utilized to maintain low ambient light levels in all places and task lights (including desk lamps) are employed to offer a higher light level in places that require more lights or during specific timings.

Daylighting: Benefits of Energy Saving Technology

The amount of sunlight available, the occupancy style and the operation strategy, all impact energy savings tremendously. Making optimal use of natural light, daylighting has several advantages over artificial lighting:

Reduce electricity bills: An appropriate design will save at least 75% of the energy utilized by electric bulbs. Since significant daylight is available during the peak utility demand hours, an efficient system can reduce demand charges.

Preserve cooling energy: Electric lights also generate a considerable amount of heat and by switching them of or dimming them when not required, 10%-20% of the energy necessary to cool a house or room can be preserved.

Happier ambience: Researchers also believe that this technique of utilizing sunlight to illuminate rooms proves healthy for the occupants. Installing daylighting devices in the commercial sector tends to increase productivity, which can be attributed to the natural brightness that instills a sense of positivism in the environment.

Daylighting

By: Mark Watson

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