The first edition of the free event ran in 2016, but this is the biggest to date.
Mayfair highlights include illuminated seesaws on South Molton Street, an ethereal and illuminated sculpture, 'Was That a Dream?' in Berkeley Square and an installation of chandeliers made from used plastic bottles, with the participation of community groups and education teams at Veolia.
Don't forget to pop in to Grays while you're in the area, here's our pick of the bright new things in this month at Grays, to bring a little light into your lives:
|Indian powder box c.1820. Available from Marco Polo Antiques|
|Aquamarine bow brooch set in platinum, with 18ct white gold pin, 1940s. Alabaster & Wilson Ltd. Available from Miwa Fine Jewellery|
|Satsuma brooch, Japanese. Meiji period. Available from Don Bayney|
|Black opal ring with diamond shoulders, 15ct gold and platinum mount. Available from C & B Gems & Antique Jewellery|
|Sir Herbert Hughes Stanton, 1870-1937, Oil on canvas. Available from Horton London|
|Russian 19c silver and plaque-a-jour enamel coupe. Available from Tabunov Antiques|