Currently taking place….Switched On London is a lighting festival that aims to highlight the importance of sustainable lighting design in the night-time urban environment.

15 locations - including the Tower of London, Southwark cathedral, Tower Bridge, London Bridge and the Design Museum - are lit from 6pm till midnight, featuring lighting designs by leading designers and manufacturers (I know sod all about lighting, but apparently they’re the leading lights of, er, lighting…)

It’s been designed as energy-efficiently as possible, and the aim - as well as creating some kick-ass designs - is to show the power of light in the city, and to highlight the unnecessary lighting of office space at night around London.

It runs until 14th Feb, so just a few days left to catch it!