NIGHT SKY AND DARK ENVIRONMENTS: BEST MANAGEMENT PRACTICES FOR ARTIFICIAL LIGHT AT NIGHT ON BLM-MANAGED LANDS TECHNICAL NOTE 457 49 5.1.10 Conduct an Inventory of Existing Lighting When Retrofitting When implementing artificial light at night BMPs at existing facilities, an inventory is essential to identify opportunities for changing lighting equipment and practices to reduce light pollution, quantify cost and benefits for BMP implementation, and measure results. At a minimum, an inventory of existing lighting records the location, luminaire type, light source type, luminaire lumen output, color temperature, wattage, mounting height and aiming (if applicable), adaptive controls (e.g., timers), any shielding, and the lighting purpose/application for each luminaire in the inventory. Other data might also be useful to record. Daytime photographs of the luminaires are helpful as well. Luminaire GIS tags can help develop location maps of lighting equipment. Notes: The National Park Service has developed a GIS-based outdoor lighting practices and inventory application, which can be used for NPS units with assistance from the NPS Natural Sounds and Night Skies Division (Pipkin and Anderson 2020). The template geodatabase includes a data dictionary to ensure consistency and instructions for collecting information. The inventory records physical properties about each luminaire, their location, and the light characteristics. The inventory data are useful for facility maintenance tasks and supporting IDA Dark Sky Places certification. The Utah Community Development Office’s Dark Sky Assessment Guide, while intended primarily for communities, is a useful resource for designing and administering a lighting inventory (Utah Community Development Office 2019). A screen capture of the National Park Service GIS-based outdoor lighting practices and inventory. The inventory records luminaire data important to artificial light minimization as well as luminaire locations.
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