My front porch overhead light fixture has two light bulbs, each of which has a positive and neutral lead. We have a two family house, and the porch is shared. Each of us has a switch in our house that turns on one of the two light bulbs. Each light bulb is on a different circuit. This works fine, but I need to replace the fixture.

Note, these are not three way switches to a single load. There are two circuits running to a fixture which has two sockets, each socket has a discrete positive and neutral.

I'd like to maintain the ability for us to control our lights individually, which would require a fixture with four leads (two per bulb). And I could just buy another, which would be fine.

But I am wondering if there is such thing as an "OR" switch that would turn on a single fixture/load if either (or both) of our switches are turned on, and only have it off if neither of our switches are on.

I could do this easily in the 12V DC world but this is 120V AC and an outdoor location so I don't want to hack this together.

Here is a picture of the current situation, after I removed the old fixture.
[![enter image description here](https://i.stack.imgur.com/CedkY.jpg)](https://i.stack.imgur.com/CedkY.jpg)