As use of LED street lights grows, so do concerns over ‘blue light’

Spurred by a desire to lower energy costs, cities and towns in the area — and throughout the country — are overhauling their street lights. One after another, high-pressure sodium lights, a longtime industry standard, are being replaced with brighter, more efficient LEDs. But specialists warn that the “blue light” from some LEDs can disrupt the body’s production of melatonin, a hormone that influences sleep, if exposed to it at night