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 am old enough to remember a time when the night sky was much darker than it is today. The skies then, when it was clear, seemed to contain far more stars than you can see now, set against a blacker backdrop. … You would look up in wonder at such a sky. Such a sky would have inspired people to become scientists in the past. It is a loss that really can be reversed, by being sensible as to how we light up property and streets at night.
Even in the depths of the countryside, genuine dark starry nights are becoming harder to find –security lights, floodlights and streetlights all break into the darkness, blurring the distinction between town and countryside. Not only that, but light pollution is shown to be harmful to wildlife, to our own health and well-being, and excess light is contributing to our carbon emissions.
CPRE Avon and Bristol
Conserving and enhancing the natural beauty of the dark night skies of the Mendip Hills AONB not only gives our and future generations the opportunity to observe the stars and the nocturnal world around us, but most importantly ensure the recovery of nature. By signing up to the Dark SkiesMatter campaign we are raising awareness of the natural beauty of the dark night skies of theAONB and the nocturnal environment, helping to ensure that dark night skies will be above us for the future.
Judith Chubb-Whittle Mendip Hills AONB
Darkness is habitat
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