Determining existing kitchen under cabinet 120v wiring to plan for LED

I’m trying to figure out how the current lights are wired so I can then determine how to wire LED lights going forward. Here is the current configuration.

House is 21 years old, original owner, custom built. Current kitchen under cabinet lights are 120v hardwired fixtures of various lengths. There are 4 of them, scattered around the kitchen. Each fixture has between 2-4 bulbs in them. Bulbs are 18w halogen bulbs.

The kitchen is an “L” shape, with the lower left “corner” of the L being open area where there is a doorway to a mudroom on one side, passthrough hallway to pantry & dining room on other as well as a kitchen office in the corner (with its own run of the same under cabinet lights).

There is one switch for the kitchen that originally turned the under cabinet lights on or off. I replaced it years ago with a Leviton Z-Wave dimmer.

I have not taken any of the lights down yet, but I can assume either the wiring is either 1) home runned to a junction box somewhere in the house (I have a guess) that allows each light to get 120 power separately, yet be all switched together via the one wall switch 2) Wire for all of them is some type of very long serial wiring, but I assume for that to work, each run would need to be wire nutted to the fixture as well as the fun that goes onto the next light.

How do you suggest I determine the current wiring configuration that allows all of the main kitchen lights to be switched via one wall switch?

Depending on if its homerunned vs. serial wiring config, if I want to continue the basic on/off function via the wall switch how do I configure this for LED?

Am I looking at a seperate power supply/transformer, lighting controller and individual run of led lighting tape for each existing fixture?

It’s pretty typical for the scenario you’re describing that all of the fixtures would be wired in PARALLEL, such that the same line voltage (when the switch is on) and neutral (and presumably ground) is provided to each fixture and daisy chained to the next fixture. In essence, one long run that goes to each fixture along the way.

Sounds like you’re not real familiar with electrical wiring, so I’d highly suggest hiring an electrician to protect yourself and your house.

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