Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Firstly to clarify that the DesignBuilder daylighting tab switches to use the Radiance engine and uses the model data you've already input (perhaps for energy/thermal/comfort simulations using EnergyPlus) which includes shading, glazing and surface reflectance properties etc. necessary for daylighting calculations. Within the daylighting tab in the current version you have two options, one is the "traditional" daylight illuminance distribution method that reports static outputs at specified conditions for illuminance and daylight factors. The other is annual climate-based daylight calculations using the Daysim engine. Your question seems to relate to the "traditional" daylight illuminance distribution method. The Help file provides some information and also refers to the (free) online DesignBuilder daylighting tutorial so you should review that as your starting point.
