The global installed base of individually controlled smart street lights amounted to 23 million units at the end of 2022. Growing at a CAGR of 22.7 percent, the number will reach 63.8 million in 2027.

Gregg Bach, a spokesperson for Street PHX, said 1,200 of the purple lights started popping up a couple of months ago in the city. ... taxpayers are not footing the bill for replacements.

Street light interference happens when a street light turns off as you approach on foot or in a car. Once you pass the street lamp, it switches back on and functions normally. RELATED: 30 Signs ...

Defective LED street lights along a stretch of I-93 along the Boston/Somerville border cast an eerie purple hue over the busy interstate on May 23. CARLIN STIEHL FOR THE BOSTON GLOBE.