In embodiments, such as in FIG. 17, the authoring computer 1750 is provided with an Ethernet connection, such as via an Ethernet switch 1754, so that it can communicate with other Ethernet-based devices, optionally including the light system engine 1654, a light system itself (enabled for receiving instructions from the authoring computer 1750), or a power/data supply (PDS) 1758 that supplies powe