The issue has been fixed, the dimming lights and flickering is gone and my oven is working at full power finally, as is indicated in the differing roastednesses[sic] of the nuts before the issue was fixed and after. And the cakes today took 35 mins on the dot, whereas in the past theyd be still jiggly.
I posted this for future reference so you can consider other things if your oven is running too cool, it might be the wiring on the curb or pole.