How can we develop products that consumers want to use for longer? The lifetime of electrical products is an ongoing concern in discussions about the circular economy. It is an issue that begins at an industry level, but that directly influences the way in which consumers use and discard products. Through a series of workshops and knowledge exchange sessions with Philips Lighting, this paper identifies which design factors influence a consumer's tendency to retain their products for longer. These were distilled into a guiding framework for new product developers-The Emotional Durability Design Nine-consisting of nine themes: relationships, narratives, identity, imagination, conversations, consciousness, integrity, materiality, and evolvability. These nine themes are complemented by 38 strategies that help in the development of more emotionally engaging product experiences. We propose that the framework can be applied at multiple points during the new product development process to increase the likelihood that 'emotion building' features are integrated into an end product.

In this paper we report on an exploration of how to apply the theory of Slow Design to mass produced products to establish more mindful usage of products; the intention behind this is to promote product attachment and the associated sustainable benefits of long term use. Slow Design is a design philosophy that focuses on promoting well-being for individuals, society, and the natural environment. It encourages people to do things at the right time and at the right speed which helps them to understand and reflect on their actions. Several authors have proposed Slow Design principles and cases have been reported in which these principles were applied in cultural design projects. These applications indicated that Slow Design can indeed have a positive impact on wellbeing. Although promising, this philosophy has not yet been used in the design of mass consumer products. In this paper we present a design case study in which we explored how the Slow Design principles can be applied in the design of an electric fruit juicer. Two studies are reported on where the conditions for implementing Slow Design are explored. The results led to a revision of the principles for use by product designers. The main finding from the case study is that the Slow Design principles can be used to create more 'mindful' interactions that stimulate positive user involvement. This is not from designing interactions that require more time per se, but by stimulating the user to use more time for those parts of the interaction that are meaningful and less for those that are not meaningful.

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LED based lighting systems have enabled radically new possibilities in the field of artificial lighting. This is due to in part to the LED being digitally controllable which means this efficient light source can also be integrated with sensors and smart environments. This has opened up a new world of lighting and lighting interaction opportunities that has been applied in new concepts in many of the indoor lighting domains. The outdoor lighting domain however has focused mostly on the LED's efficiency and low cost of ownership to save energy and money for local governments. The use of the LED as a potential means for providing interactive city lighting for social good or entertainment is as yet a fairly unexplored area. This is therefore the focus of this workshop to bring together a community of researchers, designers and technologists to explore the potential of interactive city lighting and how it could support or enhance the lives of those living in a city.

LED-based lighting systems have introduced radically new possibilities in the area of artificial lighting. Being physically small the LED can be positioned or embedded into luminaires, materials and even the very fabric of a building or environment. Hundreds of LEDs can be used in a single luminaire or space, of which each could have different light output properties. The light switch therefore in many situations will need to be enhanced or fully replaced by intelligent controls and smart environments that are sensitive to the context and responsive to the people in the environment. The focus of this workshop is to explore new ways of interacting with light where lighting is no longer simply an on or off system, but a flexible system capable of creating a large range of functional, decorative and ambient light effects.

In this paper a study is described that shows how user perception studies can potentially provide designers with guidance into how to design pleasurable lighting effects using dynamic lighting. The advent of the LED within the lighting industry has been the driving force behind this study since the lighting designer is now faced with many new and often unexplored parameters that this lamp type can offer. One aspect of this complexity is the simple means of including dynamics within a single luminaire. To explore this topic, a luminaire was specially constructed to test with users different lighting dynamics that would represent different moods.The key conclusion from the study is that there are certain lighting dynamics that were perceived as being significantly different from one another and were categorized by the participants as being of a similar mood in the high to low arousal spectrum. These findings showed that there is potential for lighting designers to apply such sequence types and be more confident that their end users will perceive the luminaire as they originally intended.

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