Dyson Spheres on the Hertzsprung-Russell diagram

Personally I very much doubt that any civilization would build Dyson spheres in their naive spherical shell form, because the gravitational field inside a hollow shell is zero and therefore nothing would stick to the inner surface and would instead drift towards the host star. (Proved by sir Issac newton)

But more than that- the concept of the sphere is making a ton of hidden assumptions about the desirability of always wanting more and more space and energy which are probably a side effect of the kind of authoritarian power structures that rule most humans currently. But that may not be common.

Cool work though- good to know what to look for