Daylight Factor, sDA and Glare analysis in Honeybee – questions about results and setup

grasshopper honeybee[+]
1

Good morning,

I am developing a Grasshopper definition (Ladybug/Honeybee) for daylight analysis in a high school classroom.

I am focusing on:

Daylight Factor (DF / FDm)**
sDA (spatial Daylight Autonomy)**
Glare (DGP/DGI)**

I have internalized the classroom geometry (4 large vertical windows), but I am encountering some issues with the results.

  1. Daylight Factor (FDm)

Despite the presence of large glazed openings, the FDm value is still below 3%.

I would like to understand:

whether I am making mistakes in the model setup (materials, sky, Radiance parameters, etc.)
or if the result is consistent with the geometry (room depth, window position, etc.)

  1. sDA

Regarding sDA, I am unable to meet the requirement:

sDA ≥ 95% of the points with **≥ 300 lux for at least **50% of daylight hours

Questions:

  • are the parameters I am using correct (illuminance threshold, sensor grid, etc.)?
  • is it normal for a classroom with these openings not to meet this requirement?
  1. Daylight hours (sDA)

I have a specific question about the calculation:

Does sDA automatically consider the 50% of daylight hours
or
do I need to manually filter the hours (using schedules or HOYs)?

  1. Glare

I am also performing glare analysis using views and DGP/DGI.

Any suggestions on:

correct view setup (fisheye, observer position, direction)
how to properly evaluate glare across multiple points and directions

would be appreciated.

Objective

I would like to understand whether:

the results are physically consistent
or there are errors in my simulation setup

Thank you in advance for any feedback.

Luca
https://drive.google.com/drive/folders/1qHSF_DZaxbD7iVW7lEZA4UZEayLv8tYL?usp=sharing

PS. I can not upload files here. I don’t know why.