Newark LED Streetlight Upgrades Fail to Sustain Crime Reduction

Brighter streetlights in Newark, New Jersey, triggered a sharp but temporary drop in outdoor violent crime before the impact vanished entirely.

According to a study from the Journal of Quantitative Criminology, the initial benefits of the city’s LED transition did not hold up over the long term.

Between March 2019 and September 2021, Newark replaced nearly 1,500 old high-pressure sodium streetlights with more efficient LED versions, Governing reported. While the move was intended to deter crime through better visibility, the data shows that the deterrent effect was short-lived.

The immediate results were statistically significant. In the first six months following the installation, outdoor violent crime in the areas surrounding the new lights fell by 46 percent.

Aggravated assaults saw an even more dramatic decline, dropping 58 percent during that same initial window. For a time, the improved lighting appeared to be a successful tool for public safety.

The initial success did not persist as the years passed. Researchers found that violent crime, specifically aggravated assaults, began to rebound approximately 21 months after the lights were replaced.

By the two-year mark, the impact on crime rates had essentially disappeared. The study suggests that the initial drop was a temporary disruption rather than a permanent shift in local safety dynamics.

One reason for this reversal may involve the adaptability of those committing crimes. Researchers noted that perpetrators might have simply adjusted their behaviors to accommodate the new lighting conditions.

Some community members even suggested that the darkness was being manually restored, noting instances where individuals may have intentionally damaged the lights to return the streets to their previous state.

Led streetlights with integrated sensors smart city applications

Crime Category	Initial 6-Month Change	Long-Term Outcome (2 Years)
Outdoor Violent Crime	46% Decrease	No lasting effect
Aggravated Assaults	58% Decrease	No lasting effect

The Newark project highlights the difficulty of using single-variable solutions to address complex social issues. While the lights did not cause crime to “displace”—meaning criminals didn’t simply move to unlit areas or switch to daytime activity—they also failed to create a lasting deterrent.

The study weighed several theoretical outcomes. On one hand, better visibility could have encouraged more “eyes on the street” by making the nighttime environment feel safer for residents, potentially fostering community cohesion. On the other hand, increased light might have allowed criminals to better identify vulnerable targets.

Ultimately, the findings indicate that lighting improvements should be treated as one small component of a much larger, multi-faceted strategy to combat crime rather than a standalone fix.

The full research, which examines the intersection of urban infrastructure and criminal behavior, is available via the Journal of Quantitative Criminology.