@Sebastiaan You are right. I love VW too. This is the versalite software. Always when I get nervous, it turns out that I forgot something or do not know something 😉 Thanks the forum for help me better understanding of the software.
For resolve my problem I have just prepared Python script. It changes All Lighting Devices to Group with corrected rotation. I like automatization. Is there somebody who can tell me if is done correctly? For me works, but I do not know if it is maked according to programming art.
x,y,z = vs.GetSymLoc3D(h)
x_rot = vs.GetRField(h,'Lighting Device','xRot')
y_rot = vs.GetRField(h,'Lighting Device','yRot')
z_rot = vs.GetRField(h,'Lighting Device','zRot')
prev_object = vs.PrevObj(h)
h_group = vs.NextObj(prev_object)
vs.Set3DRot(h_group, x_rot, y_rot, z_rot, x, y, z)
vs.ForEachObject(ConvertToGroup, "PON='Lighting Device'")