DARK SKIES

Put simply, light pollution is playing havoc with our world. It is disrupting the natural patterns of wildlife, impacting ecosystems, washing out starlight and contributing to an array of other issues including climate change and poor human health. Huge amounts of energy are wasted worldwide on the operation of unnecessary and ineffective outdoor lighting – something that in this era of net-zero ambitions and escalating energy bills, is unacceptable for most.

With approximately eight out of ten people on Earth now living under light-polluted night sky, this issue is undoubtedly far reaching and with levels of global light pollution said to be increasing at around two per cent per annum, unless very real action is taken, this problem and its effects are set to get worse.

So what can and is being done to tackle this problem and how can those responsible for energy management ensure lighting use is more efficient?

The first step is to ensure that all outdoor lights are dark sky compliant. Product selection has a huge role to play in the reduction of light pollution and it is important that robust luminaires with optics that combine advanced lens technology and enhanced glare control are chosen. These products, alongside shielded designs, will ensure a minimal amount of light is given off upward, preventing light pollution.

Many manufacturers, including ourselves, are invested in new product design. Steered by the Dark Sky Association (IDA) we are committed to ensuring that all products launched are energy efficient and generate as little light pollution as possible. To make selection of these products easier for installers, the IDA has launched the Fixture Seal of Approval programme, a product accreditation scheme which acknowledges dark sky friendly product design and manufacturing.

As with many situations where a change in approach is required, education is also playing a huge part in the movement to tackle light pollution. The IDA, alongside manufacturers and wholesalers, are collaborating with installers to ensure they understand and adopt recommended best practice. Beginning with the five commonly recognised ‘Dark Sky Design’ principles, installers are being encouraged to remember the following rules when approaching new projects:

• USEFULNESS: All luminaires specified should have a clear purpose and benefit, so contemplation should be given to whether lighting is actually needed and if so how the fitting will impact the specific area and any wildlife in the local environment.

• TARGETED: Lighting should illuminate only the area needed and not impacting on neighbouring spaces.

• LOW LEVEL: Fittings should provide only the desired level of illuminance and nothing more. Glare and skyglow should also be considered within this, with installers reminded to consider the ground surface as some may reflect more light into the sky than intended.

• CONTROL: Systems should be completely controllable and only switched ‘on’ when they are useful. Products which have integral control, such as dimmable functionality, selectable colour temperature and selectable power function are a must as they can be set to optimise colour, performance, and energy usage. Integral electronic photocell, microwave sensor and smart options are also recommended, ensuring products are only in use exactly when they are needed.

• COLOUR: The colour of the lamps is hugely important in reducing light pollution. A warmer colour with a CCT of 3000K or less should be used as they have a lower blue-violet component. By actively following these principles, building managers can feel secure in knowing that lighting installations are not only energy and cost efficient, but generate minimal amounts of pollution. Light pollution undoubtedly affects everyone who lives and works in the built environment but with a considered and well defined approach it’s negative effects can be reduced. https://ansell-lighting.com/