A luminaire , comprising: at least first and second waveguides (302 and 304), each of the first and second waveguides having a first end and a second end, wherein the first waveguide comprises a first coupling surface extending between a first surface and a second surface opposite the first surface, wherein the second waveguide comprises a second coupling surface extending between a third surface and a fourth surface opposite the third surface, and wherein the first and second coupling surfaces define a coupling cavity formed by a housing extending along a length dimension of the first and the second waveguides between the first end and the second end and the coupling cavity separating the first waveguide and the second waveguide ; a plurality of light sources disposed along the length of the housing within the coupling cavity ; characterized in that : the first and second coupling surfaces are disposed at a non-zero angle relative to one another; and the first and second coupling surfaces are nearer each other where the first and second coupling surfaces meet the first surface and the third surface , respectively, and the first and second coupling surfaces are angled about the plurality of light sources , and wherein each of the first and second waveguides (302 and 304) includes a body having a lateral extent defined by the first and second surfaces (122 and 124) and the third and fourth surfaces (128 and 130), respectively, and wherein each of the first and second waveguides (302 and 304) includes a curved portion adjacent the coupling surface. at least first and second waveguides (302 and 304), each of the first and second waveguides having a first end and a second end, wherein the first waveguide comprises a first coupling surface extending between a first surface and a second surface opposite the first surface, wherein the second waveguide comprises a second coupling surface extending between a third surface and a fourth surface opposite the third surface, and wherein the first and second coupling surfaces define a coupling cavity formed by a housing extending along a length dimension of the first and the second waveguides between the first end and the second end and the coupling cavity separating the first waveguide and the second waveguide ; a plurality of light sources disposed along the length of the housing within the coupling cavity ; characterized in that : the first and second coupling surfaces are disposed at a non-zero angle relative to one another; and the first and second coupling surfaces are nearer each other where the first and second coupling surfaces meet the first surface and the third surface , respectively, and the first and second coupling surfaces are angled about the plurality of light sources , and wherein each of the first and second waveguides (302 and 304) includes a body having a lateral extent defined by the first and second surfaces (122 and 124) and the third and fourth surfaces (128 and 130), respectively, and wherein each of the first and second waveguides (302 and 304) includes a curved portion adjacent the coupling surface. the first and second coupling surfaces are disposed at a non-zero angle relative to one another; and the first and second coupling surfaces are nearer each other where the first and second coupling surfaces meet the first surface and the third surface , respectively, and the first and second coupling surfaces are angled about the plurality of light sources , and wherein each of the first and second waveguides (302 and 304) includes a body having a lateral extent defined by the first and second surfaces (122 and 124) and the third and fourth surfaces (128 and 130), respectively, and wherein each of the first and second waveguides (302 and 304) includes a curved portion adjacent the coupling surface. <EOS>