Within the EU 2020 strategy Carbon reduction is a major theme. Europe's ambitious goals can only be achieved in this field when next to companies and individuals, also (local) governments will deploy more emphatically in energy conservation and renewable energy sources. Local governments are responsible for public lighting. The latter is a real energy consumer and responsible for a high level of Carbon (CO2) emissions. Attention and actions aiming on more energy efficient and (more Carbon efficient) public lighting is ‘the quick win' both in terms of Carbon and energy reduction. By focusing on sustainable public lighting with the basic principle "single light when and where light is needed" in combination with technological optimization can be up to 30% savings in energy consumption. The main problem is that, despite of the financial and ecological potential, the implementation of these techniques is lagging behind. That is partly because local authorities are not familiar with these techniques (technical complexity, lack of demo projects, ...). On the other hand, often times there is resistance from local politics and citizens because of financial (high investment costs) and perceived social motives (social and traffic safety). That’s why local governments often choose for conservative solutions, which reduce the opportunity to achieve both financial and ecological potentials. What needs to be demonstrated is: - Which technique is suitable for which circumstance and what are the consequences in practical circumstances (eg central light management systems)? - What is the effect if we remove the light part or lights will be replaced by other technology? - What is the social impact (in terms of crime) and traffic impact of sustainable public lighting? - how to realise awareness and to organise support to stimulate and to realise sustainable public lighting? - what kind of innovative financial instruments are possible to fund sustainable public lighting? According to the general opinion there is only one solution possible to demonstrate that sustainable public lighting has enormous potential: Convincing by showing!