omnidirectional light with a radiation angle of 360° for operation at night and at twilight (night marking of aviation obstacles)version “R”: optional completely redundant construction of LED (2 in 1), electronic and power supply in one housing. Therefore, a second light is not necessary.version “A”: switch to standby light in case of error automaticallyversion “M”: integrated function monitoring with potential-free fault contactextremely long service life of over 50, 000 hours, hence maintenance-freeoptionally equipped with mounting-friendly plug contact