Lighting apparatus

Lighting apparatus for providing light and suitable for being positioned adjacent an area or object to indicate the location or orientation of the area or object, wherein the apparatus is adapted for detecting a decrease in ambient light below a threshold level and providing the light on a first occasion for an initial period when the decrease in the ambient light below the threshold level is detected and on a second occasion for a subsequent period during an operation cycle of the lighting apparatus, and timing a predetermined period which is interrupted by the provision of the light for the initial period, and wherein the operation cycle is such that an interval between the first occasion and the second occasion on which the light is emitted is determined by time of the predetermined period remaining at the expiry of the initial period.

A lighting apparatus for projecting light onto a remote surface for indicating distance from the apparatus to the surface, comprising:

• a housing, including a concave channel of a fixed and predetermined curvature;
• a set of light emitters mounted to the concave channel for emitting light onto the remote surface and being positioned side by side with respect to one another, the light from each light emitter of the set, according to the curvature of the concave channel on which it is mounted, overlapping with the light from each immediately adjacent light emitter of the set;
• wherein the light emitters are staggered about a plane of reference for emitting the light outwardly from the housing at an increasing angle along the set relative to the plane of reference, such that the light from the light emitters when viewed at a distance from the housing is rotated about an axis of rotation projecting from the plane relative to the set of light emitters, the light emitters being held in an essentially fixed orientation relative to one another and the housing at all times during operation of the lighting apparatus.

A signalling apparatus for being positioned adjacent an area to indicate the location of the area, comprising:

• a housing, including a concave channel of a fixed and predetermined curvature;
• a set of infrared emitters mounted to the concave channel for emitting infrared light to indicate the location of the area and being positioned side by side with respect to one another, the infrared light from each infrared emitter of the set, according to the curvature of the concave channel on which it is mounted, overlapping with the infrared light from each immediately adjacent infrared emitter of the set;
• wherein the infrared emitters are staggered about a plane of reference for emitting the infrared light outwardly from the housing at an increasing angle along the set relative to the plane of reference, such that a band of infrared light is formed that when viewed at a distance from the housing is rotated about an axis of rotation projecting from the plane relative to the set of infrared emitters, the infrared emitters being held in an essentially fixed orientation relative to one another and the housing at all times during operation of the signalling apparatus.