As the southern hemisphere moves into darker evenings and cities evolve to meet ambitious sustainability goals, one area is quietly coming into sharper focus: how we light the night.
For decades, the approach to outdoor lighting has often leaned towards “more is better”. That means we have seen brighter streets, floodlit spaces, and uniform illumination regardless of context.
Today, we shift towards balance: how to provide safe, functional lighting while preserving the natural darkness that both people and the environment depend on.
A GROWING CASE FOR DARK SKY THINKING
Artificial light at night doesn’t just brighten our surroundings for safety, it can reshape them. Excessive or poorly directed lighting contributes to skyglow and glare, washing out the night sky and reducing visibility rather than improving it. It can also disrupt ecosystems, affect nocturnal wildlife and alter natural behaviours.
For people, the impact is more subtle but just as important. Overly bright or glaring environments can feel uncomfortable and can even be unsafe. Light spilling into homes can disturb sleep, while high contrast between light and shadow can make navigation more difficult.
Effective lighting design is no longer defined by intensity alone. Instead, it’s about precision.
Carefully controlled optics, appropriate light levels, and thoughtful placement all contribute to environments that feel clear, legible, and comfortable. By directing light only where it’s needed, designers can reduce glare, eliminate wasted spill, and create more consistent visibility across a space.
This approach often results in spaces that feel calmer and more intuitive to navigate, without the harshness associated with over-lighting.
PRACTICAL DESIGN PRINCIPLES
At C.U. Phosco and those responsible for public lighting – whether that’s local authorities, planners, or contractors - there are several straightforward ways to align with dark sky principles:
- Choose full cut-off luminaires to prevent upward light spill
- Opt for warmer colour temperatures to reduce environmental impact
- Use adaptive controls like dimming and motion sensors to match lighting levels with real-world use
- Design to need, not excess, avoiding the temptation to over-light
- Focus on uniformity, ensuring spaces are evenly lit without harsh contrasts
- Choose a Dark-Sky Accredited luminaire: C.U. Phosco Dark-Sky-accredited products include: E950, E951 and P852K, ideal for residential areas, and the P861, P862 and P863 for roads and highways. Our products have been rigorously tested by the third-party certification to ensure minimal glare, light spill and is considerate of the local environment.
Dark sky-friendly lighting isn’t limited to rural or protected areas. It has a role to play across the entire built environment.
In residential streets, it can reduce light trespass and improve comfort. In parks and pathways, it can support safe movement while maintaining a sense of tranquillity. In commercial and civic spaces, it can enhance the visual experience without overwhelming it.
LIGHTING THE WAY FORWARD
As environmental standards tighten and public awareness grows, designing for dark skies is quickly becoming part of mainstream best practice.
It offers a clear opportunity to reduce energy consumption, limit environmental impact, and create more human-centred spaces, all without compromising on safety or performance.
By using it more thoughtfully, we can create places that are not only safer and more efficient, but also more respectful of the world around us.
Find out more about our Dark-Sky Accredited range