Dimming lights...bright lights...dimming...bright...

I just replaced all of the wiring in my car, including everything that goes with that- light bulbs, H4 headlights, flasher, upgraded voltage regulator, alternator, etc. I even grounded all the dash lights separately, which made them a thousand times better. I ran a wire and grounded the alternator to the voltage regulator, and then to the battery- I grounded the taillights, etc, etc, etc.

Everything has been working excellent, bright lights, blinkers actually blinking without taking a minute between each blink, and so on.

Yesterday I left work really late and turned on the lights-

All of my lights now start to dim, then get bright, and this cycle continues at a constant rate. Engine rpms have no effect.

Anyone know what the h-e-double hockey sticks is going on?

It gave me a banging headache watching it the whole way home.