I've looked at the annotated photometric plan example for this credit, and I noticed that at the project boundary, the vertical and horizontal footcandle values are reported as one single value.

Does this mean we have to combine the two values into one?

I am asking this is because the Lighting designer in our project said her simulation software can only do one simulation at a time, vertically or horizontally, it can not add these two together, as she is using a free software and it has its limitation.

So is it alright to do the vertical and horizontal simulations and report them separately then? If not, can you give me the name of a software that is capable to do a combined simulation please?