NEMA C136.19 - Roadway and Area Lighting Equipment - High-Pressure Sodium (HPS) and Retrofit HPS Lamps for Mercury Ballasts - Guide for Selection

NEMA C136.19 - Roadway and Area Lighting Equipment - High-Pressure Sodium (HPS) and Retrofit HPS Lamps for Mercury Ballasts - Guide for Selection
Summary
This standard covers the selection of high-pressure sodium lamps recommended for use in roadway and area lighting equipment.