Can 2 circuits power sources 1 LED?

I've tried searchinf but can't find a similar set up. I have two pairs of LED spotlights. The aim is to use them as a set of driving and a set of fog lights. However, I want to have a Hi/Low switch (think Hi/Low beam headlights). My thought is to use an On/Off/On switch. One circuit is straight 12V going to the two switches (one for fog, one for driving). The second circuit would go through some sort of resistor or dimmer or SOMETHING before powering the two switches. I think this might be complicated even further because I would also like the option to use both pairs of lights at the same time. I've drawn a crude diagram for what I think this could look like, but can't get it to attach right now (I'll keep trying). It's probably completely wrong so try not to mock me too much.

Completely possible to do.

It would be far easier to run X # of them for low beams then kick more on for "high beams"
Instead of wasting power with a resistor set up ... If you insist on using a resistor you could use a relay and Short the resistor out for high beam use

Thanks. I'm worried even onbe pair may be too bright for oncoming traffic. I want to dim the existing LED spotlight and Floodlight.