Welcome our partner for…

…Sustainable & Innovative Lighting Design & Consultancy, ambiguous.

Lighting design beyond aesthetics.


ambiguous is a lighting design studio driven by ecocentrism values, based in Singapore and Tokyo lead by award winning lighting designer Yusuke Hattori.

Design Approach

Regenerative Lighting Design 

Regenerative means creating positive impacts rather than merely minimizing negative ones, and goes beyond “sustainable”. Applying this philosophy in the context of lighting design means taking for granted conventional lighting design approaches that reduce negative environmental and social impacts, such as energy conservation and light pollution, and creating light environments that actively contribute to the regeneration and enhancement of natural systems, social systems, and economies, including human. A comprehensive design approach is required, taking into account the interrelationships of many conditions and elements. Regenerative lighting design principles are integrated with all our design/ consulting services.

Regenerative Lighting Design Principles

‍Promote Wellness

Lighting plays important role in health happiness that encompasses physical, psychological, and social well-being.
‍‍Design light environments that consider the impact of light and lighting on human health and wellness. Examples include designing light environments that support healthy body clock rhythms and minimize the negative effects of artificial light on sleep and overall health, and using natural light to improve people’s wellness by creating connections to the natural environment. Our design approach includes supporting WELL certification, improving visual comfort, lighting to improve quality of life, considering the natural circulatory rhythms of humans and animals, using natural light, as well as inspiring and motivating and encouraging social participation.

‍Circular Economy

As lighting designers, we have a responsibility to act proactively toward the future of our planet and humanity.
We believe that one of the roles of the light environment designer is to consider what kind of lighting products to use. They need to understand whether products are sustainably sourced and made from materials that are environmentally friendly, recyclable and reusable, and minimize waste from the production, delivery, installation, and disposal of lighting fixtures. A circular economy is the most effective way to lower our carbon footprint, and the lighting industry must urgently transition to such an ecosystem. We can assist in the repair and reuse of lighting fixtures and advise on appropriate lighting business models, including logistics to reduce waste.

‍Lower Environmental Impact

Night supposed to be dark. We work on designing light environments with the awareness that nighttime lighting is harmful to non-humans.
Night is inherently dark, and only humans need lighting. Nighttime lighting, which has become indispensable for human life, is only a hindrance toother plants and animals. Light is harmful to them. By working to reduce nighttime light, we can minimize the negative effects of light on wildlife, protect ecosystems, and support biodiversity. Consider whether the lighting is really necessary and design appropriate brightness, luminaire installation, and product selection to minimize light pollution. All municipalities, developers, building designers, and those engaged need to understand this and take action.

‍Lower Energy Consumption

Using LEDs is not the only way to save energy. First, we consider and design whether the light is really necessary. Light is energy that is converted, and ideally the energy consumed to do so should be close to zero. One strategy is to encourage the use of renewable energy sources such as solar and wind power in preference to fossil fuels, but there is much more that lighting designers can do besides using LEDs, including reducing non-essential light, creating a sense of brightness rather than illuminance, choosing efficient lighting fixtures, and using lighting dimming technology. There is much more than just using LEDs. It can also assist with certifications such as LEED, BREEAM, and GREENMARK.


need more info? get in touch