You set some good deadlines but humanity has an opportunity to transcend these limits.
"Technological level close to the level presently attained on earth, with energy consumption at 4×1019 erg/sec (4 × 1012 watts)." Guillermo A. Lemarchand stated this as "A level near contemporary terrestrial civilization with an energy capability equivalent to the solar insolation on Earth, between 1016 and 1017 watts."
"A civilization capable of harnessing the energy radiated by its own star (for example, the stage of successful construction of a Dyson sphere), "with energy consumption at 4×1033 erg/sec." Lemarchand stated this as "A civilization capable of utilizing and channeling the entire radiation output of its star. The energy utilization would then be comparable to the luminosity of our Sun, about 4×1033 erg/sec (4×1026 watts)."
"A civilization in possession of energy on the scale of its own galaxy, with energy consumption at 4×1044 erg/sec." Lemarchand stated this as "A civilization with access to the power comparable to the luminosity of the entire Milky Way galaxy, about 4×1044 erg/sec (4×1037 watts)."