OL100D low intensity double obstruction light is composed of two OL100S single lights and a compartment for its control board. It has two operation modes: “Service+Standby” and “Service+Service”.
Service+Standby: two OL100S single lights work simultaneously, and either failure does not affect the other normal operation.
Service+Service: one OL100S single light (Service light) operates normally. Once Service light fails, OL100D automatically transfers to Standby light for continuous operation.