Lighting up the town Public lighting is expensive for local authorities. The financial cost is further compounded by the associated CO2 emissions, especially on Reunion Island where coal predominates in the energy mix. Urban lighting is also a source of visual pollution that causes the mass stranding of young petrels dazzled by the halo of light when they fly from the mountains to the sea where they feed.
An astronomical clock On Reunion Island, EDF’s teams are working with municipalities to rethink their public lighting by changing both their equipment and practices. Two outcomes are targeted: reduce the electricity bill and avoid dazzling the petrels – an endangered species – as light causes them to become stranded on their way to the sea from their mountain nesting places. For example, an astronomical clock can be used to switch off public lighting in the season when the young birds leave the nest.