Algorithm / equation daylight factor and rendering engine

[mostapha]

See the answer to a similar question here:

Illuminance value comparison on grid in Honeybee and Dialux

Hello everyone, I am trying to compare simulations models prepared in Grasshopper and Rhino. Both my models have overcast sky (in Honeybee using CIE uniform sky). However, I am getting a huge difference between the values of two simulation models. With Honeybee it is higher and almost 2.5 times of Dialux simulation. For your information, I have tried to keep the materials properties for both models same. Please find the gh file together with grid values for the simulation. Could please tell me …

Also see this for some comparison studies in Italy:

Data reliability

Hi everyone, I’m an Italian student at the University of Pisa. Due to the fact that I’m doing my thesis through Ladybug and Honeybee I had to verify Ladybug+Honeybee data reliability. Down here you will be able to check them. The analysis has been run for Pisa during May, September and January. Reading the results I have extracted from the softwares I can say they are quite good. The data pattern is fine and the most difference can be found on the north exposition. This is because of the Itali…