How to edit public blueprint variables within another blueprint's details panel?

Hey @MartiniBomb!

Try this:

Add a public variable to the house just like on the lighting grid.

On the Construction Script of the BP_House, use GetComponents on self and look for instances of LightingGrid, then pass your HouseLightColor to GridLightColor on any confirmed LightingGrids using a ForEach loop.

Hope that helps!