Patent ID: 8657466

Claim:
A lighting device for illumination of a surface area of streets and pathways, comprising: a housing positionable at a distance from a surface area to be illuminated, and multiple lighting modules arranged on a support board in said housing, wherein the multiple lighting modules include first and second lighting modules, wherein each of the first lighting modules contains first lamp units that comprise first light sources and first lenses each having an elongated shape and mounted in front of a corresponding first light source with an elongation of said shape extending in a direction defined by a corresponding first lighting module; wherein each of the second lighting modules contains second lamp units that comprise second light sources and second lenses each having an elongated shape and mounted in front of a corresponding second light source with an elongation of said shape extending in a direction defined by a corresponding second lighting module which is perpendicular to the direction of the elongated shape of the first lenses in at least one of said first lighting modules; wherein first lenses are the same as second lenses, wherein the first and second lighting modules are disposed at a periphery of the housing to define respectively corresponding first and second light distributions; wherein said first and second lamp units have respectively corresponding first and second optical axes that are substantially parallel to one another, wherein at least one of said first and second lamp units is configured to generate light distribution that is asymmetric relative to a central plane of the at least one of said first and second lamp units, wherein at least one of first and second lenses has a first substantially flat wing and a second steep wing, and wherein said first substantially flat wing is shaped to form a first beam in a first sector of the asymmetric light distribution, and the second steep wing is shaped to form a second beam in a second sector of the asymmetric light distribution, the first substantially flat wing and the second steep wing aggregately defining an elongated concave emitting surface through which light passing through the at least one of the first and second lenses from a corresponding lamp unit is emitted from the at least one of the first and second lenses.