Task Lighting
From Swikipedia
Introduction
Task lighting is localized lighting provided in a user’s work area. In other words, it is the lighting which is focused on a specific area to make the completion of visual tasks easier. Task lighting also eases eye strain when it is installed with care, which can make the work environment more pleasant. In industries where eye strain is a major issue, like computing, task lighting can also keep workers healthy and happy.
Many people incorporate good task lighting into ergonomic office and workplace layouts, recognizing that well lighted conditions are very important for everyone from jewelers to computer programmers.
Brief Description
The main purpose of task lighting is to increase the illuminance over the reading area. However, the illuminance level is not the only factor governing visibility. Contrast is also important, and a poorly positioned light source may cause contrast reduction, resulting in loss of visibility. Therefore, it can be argued that the most important purpose of task lighting in the work area is not increasing illuminance, but improving contrast.
Approaches to Task Lighting:
• Localized average lighting, where a lamp supplies both ambient light and task light
• Freely adjustable task light
• Asymmetric task light, where the lamp is placed at the side of the work area
• Approaches like under-shelf luminaires
Limitation of Task Lighting:
The actual task for which task lighting may be used ranges from very small up to about as far as one may reach with ones’ hands or available tools. Lighting of larger areas is beyond the scope of task lighting.
References:
http://www.green-building-dictionary.com/words.php
