Dark Skies Matter seeks to reduce the prevalence and harmful effects of unnecessary, artificial light and to protect fragile oases of natural darkness wherever they are still to be found.
Light pollution is the soiling of the twilight and night-time environment by artificial light. The loss of natural night and the damage and waste caused by light pollution affect us all and should matter to everyone.
It destroys a precious heritage of natural beauty that for millennia has inspired us and expanded our understanding.
It is wasteful, consuming resources unnecessarily and contributing to climate change.
It destroys the natural darkness that is essential to human health and well being.
It disrupts wildlife and impacts the wider ecology and biodiversity
It travels far from its source, escaping to pollute the countryside.
Our roads and neighbourhoods can still be safe with informed lighting design and practice
Support Dark Skies Matter by signing up to our Declaration.
Join our list of declarers and leave us some words of your own, sharing your thoughts about dark skies.
If you have a logo, consider allowing us to display it alongside those of our other supporters below.
Together we can make the night natural, health-giving
and beautiful again.
I love the night sky and the dark environment.
Rwy’n caru’r nos pan mae’r awyr yn llawn o ser. Mae’n arall-fydol! I love the dark nights when the heavens are filled with stars. You are transported to other worlds beyond. Many years ago I stopped a street-lighting effort in my proudly dark valley. Good luck to “Dark skies Matter”. Hwyl Fawr!
Dark skies should be enjoyed by everyone. A clear night is a wonder of the world. Sadly, dark skies are disappearing fast. We must reverse this trend before it’s too late.
Download, Display & Share
We encourage you to download, display and share the Dark Skies Matter logo
Champion good lighting practice by example:
• Ditch non-essential external lights
Moonlight and the starry sky are more beautiful than any ’designer’ lighting or anything you can buy in a DIY store
• Keep lights off except when needed
Don’t leave lights on all night. Instead, use properly adjusted sensors so that lights are activated when needed and promptly turned off afterwards
• Use light fittings that direct and confine light to the task in hand
Purposeful lighting goes only where it’s needed and doesn’t spill into the neighbourhood or the sky
• Ensure that lights are only as bright as they need to be
Scale essential lighting to the situation - needlessly bright lights are most likely to intrude and pollute by glare, reflection and scattering
• Favour warm-toned light
The blue-rich light included in the emissions of brilliant white LEDs is particularly far-reaching and harmful
Inform, experience and share
• Explain to others the many ways in which natural darkness is beneficial and light pollution harmful.
• Visit dark places, preferably with others, to experience for yourself the beauty of natural night, its power to heal, inform and inspire.
• Tell others about Dark Skies Matter and feel free to download the Dark Skies Matter logo to display and share. You can download it here
• If you represent an organization, please consider adding your voice to those of our Founder Supporters and allowing us to display your logo alongside theirs. You can do so here