Movement is an essential feature of life on Earth. Allowing for free movements of species is, therefore, a means to preserve biodiversity – and all the benefits it provides to Humanity. Existing models, that aim to optimise the path between fragmented reserves, focus on green and blue corridors: they help preserve biodiversity but fail to consider the deleterious impacts of street lighting on the wildlife. Light pollution, however, prompts a need to consider dark corridors, enabling for the protection of biodiversity after the twilight. Our research objective is to provide a model that determines which questionable light points need to be switched off to best preserve biodiversity based on constraints linked to social acceptance and road safety. This tool is aimed at supporting decision-makers, as far as public lighting policies are concerned.