Point-in-time Daylight Analysis, Illuminance Level (lux) of Each Sensor

I am currently working on a point-in-time daylight analysis of a room for a specific day and time. On the heat map, I can see the colorful results and its legend, but I actually need to see the exact illuminance level (lux) of each sensor. I can get the results and export them as an Excel file but I cannot differentiate which sensor has which illuminance value. Actually, it would really be great if I can see illuminance values written on this heat map visual.

Is there any solution or idea regarding that? I would really appreciate your suggestions. Thank you.

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You can use tag text 3d native gh component to visualise data on the map.


Hi @aybuketaser

For this you can use the “Screen-Oriented Text” component from Human (you can download the plugin from here> Human | Food4Rhino)

I´m attaching a simple GH template for this. Just input the Values and the Sensor Points as indicated and it should work…

Have fun!

Screen_oriented_text(show_values_per_sensor_point_as_text).gh (8.5 KB)


Hi, thanks for your help but I get this error every time I try to open .gha file of Human from Food4Rhino set up. Do you have any idea about that?

Hi, thank you for the suggestion but all the texts appeared on top of each other. I still cannot differentiate them.

Hi @aybuketaser ,

Seems like you are trying to open it directly on Rhino, thus the error.
Try opening Rhino and Grasshopper first, then drag and drop the “human.gha” file into the grasshopper canvas. That should fix it.

I´m also attaching the Human version I´m currently using, if it doesn´t work with yours try it out…

human.gha (400.5 KB)

In addition: another method would be to copy the “human.gha” file manually into the Grasshopper Components folder, which can be found: C:\Users\Your_User_name\AppData\Roaming\Grasshopper\Libraries


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Hi, @Dlagol
Yes, it is my bad. Now, I’ve correctly installed but I have another problem. The selection arrow is not correct. The red one is its selection and the blue track should be the proper one. I assume that it can be changable but I couldn’t find a way of it.

Sorry, I understood the mistake. I have had created individual points instead of using the points already existed on the sensor grid! Thank you very much again for your help, it finally worked properly.
I have only one problem left.
@Dlagol @Asisnath Do you have any idea how can I change decimals? For example, if the value is 145.9327263 then I only need 145, so that I can make the text bigger.

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My pleasure to be of help.

You just need to round up the numbers. I prefer using “Round to Decimal Place” from Pufferfish, since it gives you more control. See the attached screenshot…


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hello! i need to know how to calculate the exact lux of each sensor, if u dont mind, can i get the script of your gh file?


The file has been changed throughout the time but I will try to find earlier versions. I will send if I can find it. But you can also read the comments, they helped me a lot!

Hi all,
will you please elaborate Daylight & Illuminance analysis in grasshopper ?