Appleton Retromaster™ luminaires convert legacy incandescent and HPS lighting fixtures in C1D2 locations to LED without need to rerun wires or cut conduit ROSEMONT, IL (January 2, 2024) -- Emerson has introduced the Appleton™ Retromaster™ Series of LED luminaires, the fastest, most cost-effective upgrade path for converting legacy Appleton incandescent and HPS (High-Pressure Sodium) lighting fixtures installed in Class I, Division 2 (C1D2) hazardous locations to economical and sustainable LED technology, while keeping the ori...