Planning tread width of stairs

Hello dear forum,

I will install LED strips (running parallel to the stairs) before plastering, which will then be plastered over. Therefore, I am currently planning the stairs and would be very happy if you could support me.
We have a two-flight staircase with a landing in opposite directions, made of steel and wood, in our newly built single-family house.

Due to the stairwell dimensions and landing height (which should also serve as a windowsill), the following data result for the upper part of the stairs:
Riser height: 18.64 cm
Tread width: 24.89 cm
Rake angle: 36.83°
Step length: 62.17 cm

For the lower part, a riser height of 18.1 cm results due to the landing height.

What is the optimal tread width for the lower part in order to achieve a "uniform" staircase?

Many thanks in advance for the help.

Regards,
Tobi

62.17-(2x18.1)=25.97 cm

Thanks. So better the same step length, even if the pitch then varies?

Yes. The slope is determined anyway by the platform height. I assume that is given. Or could it still be corrected? Then I would personally prefer a uniform slope. A half cm difference in the slope is more than one would expect. Due to the platform and the two separate flights, that would still be somewhat acceptable. With a 5mm difference within a single-flight staircase, you wouldn’t be the first to fall on a staircase.