LIGHT BULB POLICY TOOLS RESEARCHEdge were commissioned by the Department of Industry to write a Market Report in to the windows industry with the aim of informing energy efficiency policy across Australia. Edge undertook stakeholder engagement, desktop research and energy efficiency modelling across the Australian housing stock to assess the impact of different policy options. Edge worked in collaboration with stakeholders to develop these scenarios and make acceptable assumptions given the large amount of uncertainty and lack of data on relevant variables.