This can now be accomplished without a separate computer running Firestorm. The new sync feature built into firmware v3.40 and above allows a single Pixelblaze to sync patterns and playlists across multiple Pixelblaze (as well as to send sensor board data wirelessly to other Pixelblazes).
See how to use the sync feature in the announcement .
Firestorm will synchronize which pattern is running and any calls to time(), but it doesn’t distribute sensor board data. You could put a sensor board in each lamp, or for a one-off install, if you can run wires to each, you can distribute one sensor board’s data on two wires to each lamp.
From a prior thread on this:
You can share a single sensor board across 2 or more Pixelblaze. If you were to bisect a big linear install, this is nice and easy because both Pixelblazes and the sensor board can be within inches of each other. You connect GND and TX from the sensor board to GND and RX on the PB boards. For longer distances you might try running a shielded twisted pair like a CAT5+ (internet suggests UART at “tens of meters”) may work.
Other threads mention achieving longer ranges for LED signals by using differential transceivers - those should work for sensor board data as well.