The Nuage Vert (or “Green Cloud”) installation aims to heighten public energy awareness in Helsinki by outlining the emissions of a local power plant via green laser. As a previous commenter points out, there’s a bit of irony present due to the high-powered laser’s high-power consumption – still, altering the local mindset for the better seems worth it. – Nuage Vert “Green Cloud” Illuminates Emissions [via Mighty Ohm]

  • Timm Murray

    I haven’t been able to find details on what kind of laser they’re using, but since your eyes pick up green better than red, a 5mW green laser goes a lot farther than a 5mW red. I’d imagine they’re using quite a bit more than that here, but there are some pretty powerful ones out there:


  • Anonymous

    Beware of water vapor!

  • A

    a .65W pump diode for a green laser won’t give that much output, maybe 200mW. Green lasers aren’t very powerful, I would bet that the laser used in this isn’t more than 500mW. It would probably use a bit more watts than that to drive it, but it would probably be less than 100W, so it is very minuscule compared to what it’s pointing out.

  • dnny

    I have seen this live, I had to see how bright would 8W laser be. The weather was not the best but I was still disapointed about the laser. One could expext that the output would be huge, but outdoors it loses much… I will try to dig some flickr arcihves for the laser picures.

  • Clint

    I’m a little concerned about pilots that happen to catch a stray laser beam in the eye through a hole in the cloud. Last I heard, blindly (pun somewhat intended) firing high-power lasers into the sky is a safety hazard. If they use a safer lower-wattage laser, I doubt their artistic experiment will be terribly visible.