Abstract: A lighting system producing a light pattern that is customized in the field by the end user to minimize light pollution. A housing supports a light source that is connected to a power supply. The housing defines an interior chamber. An opaque or low visible light transmissivity shield is bent or formed into a generally tubular shape and is inserted into the chamber surrounding the light source. The shield includes folds, perforations, pre-scoring, grooves, and the like defining sections that can be easily detached to create windows. The windows permit outgoing light to pass while the remaining areas of the shield attenuate or block the outgoing light. The shield includes teeth that engage respective recesses in the housing to prevent rotation of the shield once installed.

Abstract: A lighting system including a mount for one person installation to a support surface having a rigid conduit supplying electrical wires. The lighting system includes a housing containing a light source. A hollow suspension arm extends from the housing and a back plate is located on the arm opposite the housing. The suspension arm includes a removable bottom access plate with a knock-out blank to provide optional wiring access, and the back plate includes a frangible portion. An impact blow creates an opening in the frangible portion that leads into the hollow arm. Straight and curved extension sections are provided for optional attachment to the rigid conduit. The rigid conduit is inserted through the opening in the back plate and into the arm thus suspending the lighting system therefrom.