A new paper published in the journal Optics Express describes a system for focusing light from streetlamps directly on the area required, with almost no light leakage horizontally or vertically. Conventional street lamps scatter up to 20% of their energy away from where it is required, not only wasting power but also leading to light pollution which obscures your view of the night sky.
The proposed LED lamp uses a lens to limit where the light is projected, with a reflecting cavity to recyle light that would otherwise be wasted. The team thinks the system would use between 10 to 50% less power to illuminate a section of road than current LED streetlamps, which are already more efficient than regular lamps.
A prototype is being developed and is hoped to be completed this October.
Yes please, my goodness. Place these all over New York so we can finally get in on this night sky action. The darkness of the sky can’t be appreciated with so much light.
“It is common for koalas to roam back to their home range afterwards and become confused to find nothing there. A worker noticed a koala had been sitting stationary in broad daylight on top of wood piles for over an hour.”
One of the saddest photos you will see this week.
he is going to move to Washington with her