In some embodiments, a method, apparatus and system for enabling and disabling voltage regulator controllers are generally presented. A light source comprises the LED packages having the structure as described above. Nodes in a common subnet share sensor data with other nodes in the subnet at one rate, while nodes that are not in a common subnet share sensor data at a second substantially reduced rate. In one embodiment, the input drive shaft may selectively engage the firing drive andor the closure drive. Various types of memory packages can be integrated into a single module that is mounted to the substrate, such as a printed circuit board, for improved size efficiency.