A fault triggered emergency alarms at the art deco Hotel Gotham.
You might think it's an invasion of privacy. But GE Lighting says people are keen to let LEDs track them and deliver discount coupons to their smartphones.
The city is considering following Paris' lead in big switch-off. 'Dim Lights, Big City', or opportunity for creative new schemes?
Keel worms, mussels and squirts, oh my!