Abstract: This study presents several strategies to control day light at Bait Obaid Al-Shamesi and Emirate Fine Arts Society (Annual Photography Exhibition) where both are originally heritage buildings located at Sharjah in UAE and were renovated to museums. This study is a comparison between the methods of natural lighting used in both museums before and after renovation. The lighting results were evaluated using both manual and computer-assisted ways, the manual way to assess the light using Lutron Light Meter (LM-8000A) Anemometer and the computer-assisted way was using Revit Architecture Software with Lighting Analysis Plugin. The manual readings were during day-hour time with all artificial lights on, however, software analysis was during day-hour time with all doors shut and the artificial lights were completely "off".