![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
![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
![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
![The blue thing on top of a street light just outside my house. Some have them some dont. Never seems to light up or make a noise. Don't think it's a light The blue thing on top of a street light just outside my house. Some have them some dont. Never seems to light up or make a noise. Don't think it's a light](https://i.redd.it/drprf8neeqg21.jpg)