New technology and intelligent control pave the way for tomorrow's outdoor lighting

Outdoor lighting prolongs the day and is needed to provide a sense of safety and security, and to create attractive environments even when it is dark. However, light that is improperly directed, used at the wrong time of day, or lacks purpose can be considered light pollution. In addition, it is a waste of energy, and can negatively affect human well-being and animal habitats.

“We are in the midst of a rapid development, where biodiversity is threatened,” says Henrik Sandqvist, Product and Application Manager Outdoor Lighting, at Fagerhult. “This happens largely because of humans, and lighting is a contributing factor. Some animals are attracted to the light and others avoid it, which can create an imbalance in the ecosystem.”

HENRIK SANDQVIST, PRODUCT AND APPLICATION MANAGER OUTDOOR LIGHTING AT FAGERHULT

Today, however, there are limited standards stipulating which lighting should be used where and when. Bioinclusive Lighting involves providing light that is good for people’s well-being and urban development – with as little impact on biodiversity as possible.

“As a luminaire manufacturer, we are aware that we contribute to the increase in the amount of light. That is why we can also be part of the solution. We follow the research and guiding standards, and we listen to those who know more than we do. We want to stay ahead, and we always have Bioinclusive Lighting in mind in our product development. Our luminaire Evolume 1 has also been used in a joint study run by the University of Gävle and RISE, and we are happy to collaborate with others to find tomorrow’s solutions.”

A darker light environment

Around 80 percent of the world’s population cannot see a starry night sky. The reason is ‘skyglow’, which is caused by artificial light shining into the sky. The phenomenon is difficult to measure, but like other light pollution, it can have negative effects on humans, animals, and the environment.

“Just as we turn off the lights when we leave a room, outdoor lighting should also be turned off or dimmed when people are no longer in the vicinity. Here it becomes very clear that the right light, in the right place, and at the right time plays an important role.”

Since lighting can affect species’ habitats, the ecosystem needs greater consideration in lighting design. When replacing or installing new lighting, it is important to ask: What is the purpose of the lighting? How does it affect the environment, people, animals and nature?

“Our basic idea is that all lighting must have a purpose, and the right character and strength. The amount of light must be commensurate, and it must only directed where it is needed. Since the nature of light is governed by its spectral distribution, we want to avoid light in the lower wavelengths. The general recommendation is therefore to use as warm a light as possible.

ANNIKA JÄGERBRAND (UNIVERSITY OF GÄVLE), MARIA NILSSON TENGELIN (RISE) AND HENRIK SANDQVIST (FAGERHULT).

Adaptive lighting can also adjust the light intensity and spectral distribution, and time control and presence control enable lighting precisely when needed.

“This is nothing new, and nothing we will solve today. But a good place to start is to use a lighting designer with good knowledge of outdoor lighting and who considers the whole when devising a solution. We will continue to focus on finding an inclusive approach to create light for people that is in balance with the ecosystem,” concludes Henrik Sandqvist.

Product in focus: Evolume

The Evolume luminaire series has good light comfort, and is now available with more options and colour temperatures: 2700K, 2200K and PC Amber as well as adaptive light. This allows the intensity, wavelength distribution, and light distribution to be adapted based on need, time, and presence, and with more consideration for animals and nature.