Factorio Runtime DocsVersion 2.0.72

-- Tell an entity to be active (for example a lamp to be lit) when it receives a
-- circuit signal of more than 4 chain signals.
a_behavior.circuit_condition = {
  comparator=">",
  first_signal={type="item", name="rail-chain-signal"},
  constant=4
}

-- Tell an entity to be active (for example a lamp to be lit) when the logistics
-- network it's connected to has more than four chain signals.
a_behavior.logistic_condition = {
  comparator=">",
  first_signal={type="item", name="rail-chain-signal"},
  constant=4
}