Abstract: A light entry part (2) for receiving light from at least one light emitting element (13) and having a central axis (6a) —a light exit part (3) for outputting light having a central axis (6b) —a longitudinally extending light transmitting part (5) having a longitudinal axis (6c), wherein the light transmitting part extends between the light entry part and the light exit part, such that the central axes of the light entry part and of the light exit part coincide with the longitudinal axis of the light transmitting part; wherein the light transmitting part is at one side configured for optical connection with the light entry part and at an opposite side configured to be in optical connection with the light exit part. The light exit part comprises a central lens (7a) and two side reflectors (a, 8b).

Abstract: A light entry part (2) for receiving light from at least one light emitting element (13) and having a central axis (6a) —a light exit part (3) for outputting light having a central axis (6b) —a longitudinally extending light transmitting part (5) having a longitudinal axis (6c), wherein the light transmitting part extends between the light entry part and the light exit part, such that the central axes of the light entry part and of the light exit part coincide with the longitudinal axis of the light transmitting part; wherein the light transmitting part is at one side configured for optical connection with the light entry part and at an opposite side configured to be in optical connection with the light exit part. The light exit part comprises a central lens (7a) and two side reflectors (a, 8b).

Abstract: A beacon light optic, comprising a reflective surface having an optical axis wherein the reflective surface is composed of surface parts of at least two at least partly overlapping at least segments of rotation symmetrical surfaces, an entrance area comprising an entrance surface for allowing light to enter the beacon light optic, an exit area through which light exits the beacon light optic, a light emitting element disposed in front of the entrance surface such that light emitting from the light emitting element enters the beacon light optic through the entrance area.

Abstract: Method for controlling power to be supplied to an obstacle lighting device for emitting light in flashes, wherein the obstacle lighting device comprises a lantern with a housing and at least one light emitting element arranged in the housing; wherein the method comprises providing a control signal to control the power to be supplied to the obstacle lighting device, such that the power to be supplied varies for flashes of different time lengths.

Abstract: A beacon light optic, comprising a reflective surface having an optical axis wherein the reflective surface is composed of surface parts of at least two at least partly overlapping at least segments of rotation symmetrical surfaces, an entrance area comprising an entrance surface for allowing light to enter the beacon light optic, an exit area through which light exits the beacon light optic, a light emitting element disposed in front of the entrance surface such that light emitting from the light emitting element enters the beacon light optic through the entrance area.