Can Enhanced Street Lighting Improve Public Safety at Scale - Marginal REVOLUTION⁠↗

Over 10 months, 34,374 streetlights were upgraded across 13,275 street segments, converting roughly one-third of the city’s street segments to new LED fixtures that provide clearer and more even illumination. We assess the effect of these upgrades on total crime, violent crime, property crime, and nuisance crime. Results show a 15% decline in outdoor nighttime street crimes and a 21% reduction in outdoor nighttime gun violence following the streetlight upgrades. The upgrades may account for approximately 5% of the citywide reduction in gun violence during this period, or about one sixth of the 31% citywide decline.