Patent ID: 7967471

Claim:
A lighting unit for water fountains, ponds and the like, the lighting unit comprising: a housing sealed at least relative to splashing water; a light source arranged in the housing; a lens, having a first optical axis, arranged in the housing and aligning light emitted by the light source relative to the first optical axis: an additional lens unit, having a second optical axis, arranged in a light path of the light emitted by the light source and providing an additional alignment of the light emitted by the light source relative to the second optical axis; a closure cap securing the additional lens unit by a self-centering action on the housing and positioning the second optical axis so as to coincide with the first optical axis; wherein the closure cap has an inner guide at an end proximal to the additional lens unit which inner guide provides the self-centering action; wherein the inner guide has a surface that tapers in a direction of the first and second optical axes toward the first and second optical axes.