• Aug 13th 2007 at 12:39PM
  • 7

During the day, it makes no sense to keep our streetlights on, right? What about at night? Well, sure, not all the time. Sometimes, the moon provides quite a bit of light at night, depending on what lunar cycle we are in. The Civil Twilight Design Collective proposes making our streetlights vary their power with the moons cycles. This, combined with LED lights would save an extraordinary amount of energy versus our standard streetlights today. One might even argue that these lights would be considerably more attractive as well, as they would not overpower the light that the moon is reflecting down to earth. Ideas like this are exactly the kind of straightforward, practical thinking that we all need to move into greener modern times. Apparently, others agree with this assessment as well, as the idea has won the 2007 Metropolis Next Generation Award. I hope to see them soon!

[Source: Civil Twilight Design Collective via Treehugger]

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    • 1 Second Ago
      • 8 Years Ago
      This doesn't seem effective. Even on a predicted full-moon night, the position of the moon in the sky will have a significant effect on the amount of light illuminating our streets and sidewalks.

      Why not just build more effective light sensors like they are already using to turn on the lights when the sun goes down? Instead of just an on-off function, they could vary the amount of light based on detected ambient light, not a theoretical schedule of when the moon will shine brightly.
      • 8 Years Ago
      Got clouds?
      • 8 Years Ago
      Hey! The street lamps around my hometown are lunar resonant!

      Oh...wait...they're just not working since hurricane Wilma.
      • 8 Years Ago

      read the linked article, you'll discover all your doubts are dispelled there.
      • 8 Years Ago
      I heard of some streetlights with solar panels and battery that emit at night and recharge during the day. That combine with leds can be useful.
      • 8 Years Ago
      would like to see the lunar resonant steet light
      in action.
      this must be the way forward for future street lighting if fitted with LEDs
      • 8 Years Ago
      Unfortunately, the sodium vapor lights now in common use are much more efficient than LEDs, but are not easily "dimmable".

      I think Marc has the right idea, though. Varying the light intensity according to ambient light could make street lighting much more efficient, assuming the "dimmability" problem is solved.
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