Weird and weirder...
My car has all LED brake, turn and front marker lights.
I replaced my backup light lenses with brake/tail lenses and wired them into the brake/turn circuit of the normal lights.
So now I have 2 tail lights like normal, two turn signals on each side and four brakelights. (twice as many as factory using factory lenses)
With all that extra lighting it only draws .475 amps with them all on (parking and brakes)
You don't even see a flicker of the headlights when the brakes are applied at idle.
A single normal bulb uses about 4 times that, so it would be about 12 amps total with with my four light mods instead of less than half of one amp.