![Why are there blue lights on top of Dallas' streetlights by the Trinity River? Curious Texas sheds some light Why are there blue lights on top of Dallas' streetlights by the Trinity River? Curious Texas sheds some light](https://dallasnews.imgix.net/1534783861-NM_27bluelightsLD03.jpg)
Why are there blue lights on top of Dallas' streetlights by the Trinity River? Curious Texas sheds some light
![Hundreds more Shropshire streetlights to be converted to LED lighting in March with thousands more to go | Shropshire Star Hundreds more Shropshire streetlights to be converted to LED lighting in March with thousands more to go | Shropshire Star](https://www.shropshirestar.com/resizer/wQizioLehidekdkajq006fFMniE=/1200x0/cloudfront-us-east-1.images.arcpublishing.com/mna/DZFD6U3WZRFULPAXYXOWAWRK3M.jpg)
Hundreds more Shropshire streetlights to be converted to LED lighting in March with thousands more to go | Shropshire Star
![A close up of the top of the street lights lining The Mall, leading to Buckingham Palace, London. March 2009 Stock Photo - Alamy A close up of the top of the street lights lining The Mall, leading to Buckingham Palace, London. March 2009 Stock Photo - Alamy](https://c8.alamy.com/comp/B91368/a-close-up-of-the-top-of-the-street-lights-lining-the-mall-leading-B91368.jpg)
A close up of the top of the street lights lining The Mall, leading to Buckingham Palace, London. March 2009 Stock Photo - Alamy
![Why are there blue lights on top of Dallas' streetlights by the Trinity River? Curious Texas sheds some light Why are there blue lights on top of Dallas' streetlights by the Trinity River? Curious Texas sheds some light](http://thumbor-prod-us-east-1.photo.aws.arc.pub/Vfn8YcXwmJJeCglm2748uaoYSUs=/arc-anglerfish-arc2-prod-dmn/public/A2YH7EJN7Z2BXURIS6IBQHUQHM.jpg)
Why are there blue lights on top of Dallas' streetlights by the Trinity River? Curious Texas sheds some light
![Traffic-regulated street lights to reduce impacts of light pollution: Good news for nocturnal insects and bats? — Transport Ecology Traffic-regulated street lights to reduce impacts of light pollution: Good news for nocturnal insects and bats? — Transport Ecology](https://images.squarespace-cdn.com/content/v1/5e2574c3ee2964277b114f7c/1654870930781-U764APGG82Q85Z3RZ3F8/composite4.jpg?format=750w)
Traffic-regulated street lights to reduce impacts of light pollution: Good news for nocturnal insects and bats? — Transport Ecology
![Three led street lights on a pole against blue sky with light clouds. Modern energy-saving technology for lighting streets and roads. Led street lamp Stock Photo - Alamy Three led street lights on a pole against blue sky with light clouds. Modern energy-saving technology for lighting streets and roads. Led street lamp Stock Photo - Alamy](https://c8.alamy.com/zooms/9/69e37a081a3846e791f180ebf5def192/2bx62ac.jpg)
Three led street lights on a pole against blue sky with light clouds. Modern energy-saving technology for lighting streets and roads. Led street lamp Stock Photo - Alamy
![Denver switched to LED streetlights in Berkeley and the locals barely noticed - Denverite, the Denver site! Denver switched to LED streetlights in Berkeley and the locals barely noticed - Denverite, the Denver site!](https://wp-denverite.s3.amazonaws.com/wp-content/uploads/sites/4/2019/05/190515-BERKELEY-STREET-LIGHTS-LEDS-INFRASTRUCTURE-KEVINJBEATY-13-1024x576.jpg?resize=994,559)