• Figure 3.1.1Three power-density spectral distribution of daylight.
  • Figure 3.2.1 Patterns of entry of skylight and the rapid drop at daylight illuminance with distance from the window.
  • Figure 3.2.2 Example of toplighting applications.
  • Figure 3.2.3 Light shelves.
  • Figure 3.2.4 Light pipe in a multi-storied building.
  • Figure 3.3.1 Graphs of illuminance values due to sunlight and skylight under different sky conditions
  • Figure 3.3.2 Daylight illuminance values on horizontal plane under different sky conditions for the 4 reference days.
  • Figure 3.3.3  Plot of horizontal illuminance due to partly cloudy sky during 5-20 hrs of the 15th day of each month.
  • Figure 3.3.4 The configuration of the illuminance on a horizontal plane due to an incremental luminous surface.
  • Figure 3.3.5 The configuration of a vertical surface dA receiving flux from an incremental area da .
  • Figure 3.3.6 An inclined plane with an incremental area dA receiving light flux from an equivalent incremental area da in the sky dome.
  • Figure 3.3.7 The relative geometrical position of a point and the suns.
  • Figure 3.3.8 Zenith luminance as a function of altitude angle.
  • Figure 3.3.9 Illuminance on vertical surfaces from clear sky.
  • Figure 3.3.10 Illuminance from vertical surfaces from partly cloudy sky.
  • Figure 3.3.11 Features of the luminance from the partly-cloudy-sky model.
  • Figure 3.4.1 The three components of daylight illuminance.
  • Figure 3.4.2 The two components of IRC.
  • Figure 3.4.3 Mean horizontal diffuse illuminance from an unobstructed sky showing.
  • Figure 3.4.4 Sample graph: Percentage of year a given value of horizontal skylight illuminance is exceeded, with data from Kew and Bracknell, United Kingdom.
  • Figure 3.4.5 The configuration of light flux from a sky patch da passing through window and reaches P .
  • Figure 3.4.6 Features of the Waldram diagram.
  • Figure 3.4.7 An approximation of the rectangular window by a hemispherical surface.
  • Figure 3.4.8 The situation when the window is located a distance W d from thev projection of the point on to the plane of the window.
  • Figure 3.4.9 The configuration of skylight illumination on a wall.
  • Figure 3.4.10 The room configuration and details
  • Figure 3.4.11 Points of calculation for direct illuminance.
  • Figure 3.4.12 The configuration of the point P and the window.
  • Figure 3.4.13 The configuration of the window.
  • Figure 3.4.14 Calculated direct illuminance on various points of the surfaces in the room 1 using different methods, different sky types and different positions of the sun. All values are in klux.
  • Figure 3.4.15 Total illuminance on each surface segment for case c) of Figure 10.4.29, clear sky. as=60º, gs=30º.
  • Figure 3.5.1 Configuration of the room in the Lumen method.
  • Figure 3.5.2 The room configuration of example 3.5.1.
  • Figure 3.5.3 The resultant illuminance values from the Lumen method.