Before I run the cabling, I would like to know whether or not I should use a splitter or just extend the cable run for my exterior roof lights. Situation: I would like to have the peaks of my house on a separate feed from the controller. It would be less cabling if I use a splitter to do this, but I’m uncertain of how the lights would then be numbered (after the splitter) for creating segments. Example: Controller to first peak, approximately 30 ft, then (a) split and feed 20 lights in the 1st peak, and 20 lights in the other direction at the second peak or (b) connect to 1st 20 lights, then loop back through the same track and continue to the 2nd peak. I understand option (b) when creating segments, but I don’t know how the lights will react for creating segments using option (a).
Not exactly sure what you mean by “using a splitter”?
Your option (a) sounds like you want to try and drive the input of 2 different strings from the output of a 3rd?
In that case the 2 inputs will get exactly the same data and WLED will treat them as a single strip. There will be no way to have them display different colours/brightness as there is only a single data source.
As per your previous post, look at the Long Data Lines solutions.
That will let you layout your data as a single string, or alternatively as multiple GPIO’s from the ESP32 to each peak (or any combination of both).