Here in Norway, it's practically "do as you like".
Legally, auxiliary high beams needs to be labelled ECE R112. If the lights does not have that label, connect them as "work lights." Needs to be amber or white light, needs a separate, illuminated rocker, must be adjustable, and front and rear parking lights must be illuminated when in use.
I know I didn't make it clear, but yeah, the rocker handle on the steering column will turn off everything - high beams and all auxiliaries.
I insisted the garage who did the wiring to set it up like that. I did absolutely NOT want 2 buttons to press to turn things off when I drive.
And I can turn off every auxiliary light, and drive as the factory intended - as a control freak, I got separate buttons for everything - if I need it.
From the left: additional low beam (illegal - will be replaced to new "work lights"), fog lights (illegal - will be replaced), high beam flood lights (4x Rigid D-XL Pro 322113), roof spot light (illegal), roof work light (same light, but legal), cargo bay subwoofer amplifier (got a double 10" back there, right up to the seats).
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Everything is wired independently, with separate rockers, wires, fuses and relays, but to actually turn things on or off, I have to use the handle on the steering column. The exception - and this is where I have made the mistake during use - is the roof bar. To make it legal as a work light, it needs a separate illuminated switch - a rocker switch that is right next to the other rocker I have for that light...
So the roof bar have 2 separate rockers - one for (illegal) road use through the handle bar, and one for legal use, directly to the battery.
And if I push the wrong rocker by mistake...the handle bar no longer does a damn thing for the most powerful light I have.
I have different colours on the rockers to prevent this, but they are completely covered by the steering wheel when turning at certain angles.
My car didn't pass the vehicle control last time (and is now considered illegal to use). Which, ironcally, was not due to too powerful lights, but because my lights did not have the right certification for their use (my fog lights and reverse lights).
You want the real irony of it all? I HAVE TO install even more powerful lights on my car to make it legal, only because of the certification.
Don't go look for logic, there is none. And as for my old halogens vs new LED-lights, I was told by the vehicle inspector to just slow down.
The law didn't allow for me to solve the issue by adding more low beam lights (which I will do anyway, calling them "work lights" and have them wired as such), or change the bulbs I have to LED (which I cannot do because of the car design).