Light travels in a straight beam and enters glass panels and openings to give the natural daylight lighting. Light enters and reflects in a highly predictable manner onto the floor and walls.

Predicting Daylight

• How much daylight can penetrate into a space depends on factors such as the visible sky angle, dimensions of room, total area of window, visible transmittance of glass and reflectance of surfaces inside the room.
   

• Reflected light contributes significantly to the amount of light available in the building. Amount of reflected light depends largely on the reflectance of the surfaces in the building. Illuminate using reflected light with diffusing surface can diffuse light to cut down direct beam and reduce potential glare problems.

   

Controlling sunlight

• Daylight is managed with daylight media and temperature control to obtain the balance of required sunlight and required temperature.
   

• The usage of daylight media requires integrated usage of properties of glazing, skylight, window, shading device and taking note of various properties such as heat and light transmittance and reflectivity of surface.
   

• Besides integration of usage of properties, specific orientation of daylight media and facing of building needed to be considered as well.