For almost two generations of Chicagoans, orange has been the color of night. High pressure sodium vapor lights, which create a glow reminiscent of a tire fire, have lit Chicago since the 1970s. Th… ...

I detest sodium-vapor streetlights, whose yellowish glow now colors the night and stains metropolitan horizons everywhere. When I was growing up in suburban California in the 1960s and ’70s, the ...

The new streetlights are now the city’s standard light, replacing sodium vapor lamps that Mayor Richard J. Daley first had installed in the mid-1970s to increase the level of street lighting and ...

Blake is leading a push that has temporarily halted Miami-Dade’s replacement of thousands of suburban streetlights powered by traditional sodium-vapor bulbs with the more energy efficient LED bulbs.