An example control system includes a set of light fixtures connected to a hub, where each light fixture includes a hub-communication device configured to communicate with the hub and a direct communication device configured to communicate directly with other light fixtures. Together, the light fixtures form a mesh network facilitated by the use of their direct communication devices. An external device communicates an instruction to a light fixture, and the instruction is propagated throughout the mesh network through communications among the light fixtures using their respective direct communication devices. As a result, each light fixture to which the instruction applies receives and complies with the instructions. The light fixtures are also configured to receive instructions from the hub, such that a light fixture is configured to receive instructions over dual networks.