Abstract: A light guide assembly includes light guide segments, each including opposed major surfaces and a light input edge extending in the thickness direction therebetween. One of the light guide segments includes a first side edge surface including one or more side edge surface sections, at least a portion thereof oriented non-parallel to the thickness direction. Another of the light guide segments includes a second side edge surface complimentary to the first side edge surface. The one of the light guide segments is arranged adjacent the another of the light guide segments and abuts the complimentary second side edge surface, the one of the light guide segments variably positionable relative to the another of the light guide segments about an axis parallel to the length direction. A lighting assembly includes the light guide assembly and a housing assembly having housing segments, each associated with one of the respective light guide segments.