- 9:35 pm - Wed, May 8, 2013
- 2 notes
Light-emitting diode (LED) streetlamp aims to improve public’s view of stars
Current designs “leak” large amounts of light in unwanted directions, obscuring views of the stars, wasting energy and making it harder for drivers to see.
Conventional street lamps - which use high-pressure sodium or mercury vapour - scatter up to 20% of their energy horizontally or vertically because it is difficult to control their beams.
It is easier to direct light from LEDs because it is being emitted from a smaller area.
The best LED streetlamps on the market direct about 10% of their energy horizontally or vertically.
But they [the researchers] claim their own invention could further reduce the amount to just 2%. Read more.