Does it have to be wireless between the lights with switches since you anyway a decent power supply to feed your LED 'flowers'. You could go with one puck per device as pictured, add a I2c or SPI 16 port expander with FET drivers for the lights and another 16 port expander to collect the momentary switch presses. The pucks could talk with each other and control lights - on / off - across such devices.
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