Abstract: A signal apparatus is used in combination with a fishing rig. The rig includes a substantially upright mast and a normally straight resilient strip. The resilient strip has one end fixed near the top of the mast and another end releasably secured on the mast at a position to bow the mast. The signal apparatus includes a case having a lower cavity sized to receive the top of the mast to support the case. The case has a lateral cavity sized to receive a storage source of electrical energy. A pair of battery terminals is mounted at opposite ends of the lateral cavity. An electrical light is mounted atop the case. A switch is mounted laterally upon the case opposite the lateral cavity. The switch is serially connected with the electrical light and the pair of battery terminals. The switch has a laterally projecting, reciprocatable, electrically isolated actuator for operating the switch to close and open the circuit with the light and the battery terminals.