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Sustainable Lighting – Page 2 – ACE Lighting Update
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Sustainable Lighting

Apr 03 2026

Why is daylight integration important in roof lighting?

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in Light Experts, Sustainable Lighting, Technology

In this feature, Neha Bora elucidates how an ergonomically designed lighting system can facilitate optimal visibility and enhance overall well-being. She also outlines the best practices for designing skylights. Light is a powerful wellness toolIt is important to view light as a powerful wellness tool rather than just a medium to see things. Light has the ability to influence everything from our skin to our brain chemistry. When used perfectly, light can enhance mood, boost productivity, and regulate sleep cycles. Natural daylight is a cornerstone of health and wellness. However, many commercial and industrial buildings still suffer from poor lighting, often due to low-quality or poorly designed roof lights that allow only very little natural daylight to penetrate the interior. This lack of sunlight is a potential deterrent and can lead to fatigue, eye strain, and decreased focus. Need for a well-designed roof lighting system in industrial spacesA roof lighting system is a vital solution for industrial spaces. Integrating a roof lighting system into industrial buildings with large footfalls is a strategic investment that offers numerous benefits apart from aesthetic appeal; these include enhanced employee well-being and improved energy efficiency. Natural light, brought in through roof lights, reduces the need and reliance on artificial lighting, leading to substantial energy savings and lower operational costs. A roof light system can come in various designs and styles, catering to different needs and architectural preferences. Beyond providing natural light, roof lights can often serve additional functions such as ventilation or access points to the roof. Their versatility makes them an excellent choice for enhancing both the functionality and aesthetics of a building. What architects need to keep in mind?In addition to the practical benefits, roof lights can greatly enhance the space’s aesthetic appeal. The natural light that they bring in helps create a connection between the indoors and the outdoors.  This can make a space feel more open, airy, and welcoming. Architectural designs should focus on roof lights as a feature to create a visual focal point or add a unique character to a building. For example, skylights or roof light systems with multiple panels can create dramatic lighting effects and highlight key architectural features of a building. The most effective method of providing even, consistent daylight, particularly in large buildings, is through roof lighting; it can be up to three times more efficient than windows of similar area. Diffusing materials should be used wherever possible to provide even light distribution and avoid glare. Wall glazing may be less effective than roof lighting and can create internal shadows and dark corners. Key considerations while designing skylights include understanding their purpose and function, selecting the right location/orientation of the skylight, choosing the correct type of skylight (fixed skylights, tubular skylights, curb-mounted skylights, dome skylights, etc.), selecting the right glazing and materials, and waterproofing and flashing. A common guideline is to design 5-15 percent of the total floor with skylights, taking into account the interior design and energy efficiency aspects. For more information, visit: https://www.synodalighting.in/ ...

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Apr 03 2026

What matters when talking about sustainable lighting?

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in Light Experts, Sustainable Lighting, Technology

The last decade has been a transformational time for the lighting industry. It was a time when LEDs took over every application, gearing their efficiency and low-cost lumens to be taken for granted. However, the phenomenal improvements brought by LEDs have led to misguided concepts in the industry that “LEDs are efficient,” triggering lighting designers to use blanket illumination.  But now, with the climate crisis on the edge, sustainability has been pushed to the top of the agenda. Efficiency does not necessarily mean sustainability. Lighting designs for a space should focus on where to illuminate and the illumination achieved in lux/watt rather than the efficiency of the light fittings in terms of luminaire lumens/watt.  Designers have recently started advocating a combination of low-glare, precisely targeted task lighting and a general movement towards illuminating vertical surfaces over the floor.  Light is directed exactly where it is required for carrying out tasks and where it is most effective for human perception; light is reduced everywhere else. An increased emphasis on people-centric lighting designed for visual comfort has resulted in switching the focus from the floor to the vertical surfaces. The walls need to be illuminated rather than the floor to make a space feel bright.  For example, the room feels three to five times brighter if 100 lx is put on the wall instead of the floor.” Superior lighting with half the energy Historically, walls were not prioritised. But the European Indoor Lighting Standard EN 12464-1’s latest version has started taking it more seriously. In workplaces/offices, prioritising to guide light where human perception requires it would dictate that light is delivered to the desktops or laptops.  For instance, in a 100 sq.m office, desks could make up 20 sq.m of the space.  So, if only the walls and desks were to be lit up, compared to uniform blanket illumination, almost half the energy would be saved while creating a better and brighter visual space for people. The need for a design rethink started with spotlights.  Many spotlights on the market today use a combination of chip-on-board (CoB) LED modules with reflectors.  While the combination achieves a good luminaire lumen/watt measurement, it generates a large, uncontrolled corona of light around the beam, resulting in wasted stray light.  This is because much of the light from the CoB modules does not hit an optical system but gets scattered everywhere—additionally, the very phenomenon of reflection results in a reduction of light. ERCO solution for energy efficiency ERCO spotlights use lens systems with single high-powered chips.  Although tiny, this bright point of light is much easier to control into a narrow beam of effective light. ERCO’s chips and printed circuit boards are indigenously designed, and the chips are mounted on the boards before they are paired with customised lens designs. Although this model has only nominally lower lm/W values, it brings up to 20 percent more light to the target surface than its competitors.  This means that planners who only look at the lm/W values on a luminaire’s technical data sheet are giving away the potential for sustainable lighting, focusing on more light in the target area and energy savings. The lx/W metric is the key to effectiveness The latest generation of the ERCO Parscan spotlight, for instance, has a high lumen-to-watt ratio of 105 lm/W, but it has an ultra-high lx/W metric compared to other luminaires, a testimony to its effectiveness. An additional important aspect of sustainable lighting is avoiding glare. If there is glare, the visual contrast is lowered, requiring more light to be added to the task. The combination of effectively targeted light and high visual comfort may sound simple at first glance, but its implementation can be radical!  With the climate crisis looming and those lumens no longer cheap, a radical approach that recalls perception-orientated lighting design with high visual comfort is probably just what is needed. For more details, visit: https://www.erco.com/en/ ...

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