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GRSWLRQRIGD\OLJKWDVDQHQHUJ\�HIoFLHQF\�VWUDWHJ\� is especially relevant for a climate like Malaysia, as the country experiences long sunshine hours through- out the year. An important aspect of effective daylight strategy is the performance of the window in permitting daylight entry. This paper presents a study conducted WRDFFRXQWGD\OLJKWDYDLODELOLW\�LQDQRIoFHLQWHULRUXQ - der various fenestration options; namely window-wall- ratio (WWR), glass types and application of external shading devices of varying depth. The study used IES RADIANCE software and the Daylight Factor method to analyse its outcome. Daylight Factor (DF) was used DVWKHEDVLVWRHVWLPDWHWKHSHUFHQWDJHRIGD\OLW�?RRU� DUHDRIDJHQHULF����PGHHSRIoFHFHOO��7KHRSWLPXP� WWR to achieve the maximum percentage of daylit