Go to Top Viewport, set the pivot this time to (0, 0) in Y gizmo. Make sure the affect pivot only is active. Then Deactivate after you finish setting it. (In Tab Hierarchy)
Done. Set the group gizmo, then we copy the lights in instance using the Array tool. (Tools > Array) Settings refer to the image
Go to Top Viewport, select all the lights except the Target. (Ungroup all the lights first) The easier way is ungroup all the lights > CTRL + A> hold ALT + select all the Targets.
After doing this, select the Directs, copy it to Y gizmo and use instance copy. (Front Viewport) Then copy it again once more, scale it until it looks like the shape of a dome. For a better results, add 1 direct above the dome by select 1 direct copy instance and move it upward and set the Gizmo X & Y to (0,0).