• Ganiya Thasneem
• Sangeeth, K.

Using natural light to illuminate the interiors of buildings can significantly reduce both lighting electricity consumption and peak demand for electricity. In addition, there are health and color rendering benefits associated with full-spectrum natural light. However, widespread adoption of day lighting techniques has been hampered by the lack of both daylight resource information and simple, reliable methods of testing day lighting designs. The luminous efficacy of daylight is generally superior to that of commercially available electric lamps, which means that sunlight has the potential for reducing building cooling loads by replacing electric light of higher heat content. Natural light is plentiful during the hot summer periods when many utilities experience their peak demand, suggesting that there is a potential for substantially reducing peak electric demand, with consequent demand-charge savings for the building owners and reduced capacity requirements for the utility. Considering the above parameters a study was conducted to assess the daylight performance of a space and to analyze how day lighting and various parameters related to day lighting which affect the visual comfort of a space. Initially a structure of the aim and objectives was formed and a literature study on the topic day lighting was done. Thereafter a space was selected and a detailed live case study was done by measuring the daylight intensity and the data were analysed with respect to various factors affecting the day lighting phenomena and the problems or flaws of the particular space were identified. Attempts have been made to solve the identified problems of each space using different options with the help of a working model, where the issues are replicated and various solution techniques were applied. From the study it could be concluded that the issue of over lighting and glare can be reduced by reducing the width or height of the window openings along with extending the sunshades. Increasing the sill height of the window above the work plane can help in a even distribution of light throughout the room. Curtains and fins can be also provided in case of sunny days with can be removed when not in use which will help to reduce glare. Increasing the width of the window cannot make change in the intensity of the daylight if the surrounding areas have obstructions. Again increasing the length of the sunshade can help in controlling the glare. In addition to this selecting the surface materials with proper reflectance can help in improving the quality of the space.

"Assessment of Day Lighting Performance of Institutional Building", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.34-39, May - 2019, Available :http://www.jetir.org/papers/JETIRCN06007.pdf

"Assessment of Day Lighting Performance of Institutional Building", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp34-39, May - 2019, Available at : http://www.jetir.org/papers/JETIRCN06007.pdf