LONDON — The lights have gone out at Piccadilly Circus.

The famous electronic advertising signboard in central London went dark Monday for several months of renovation.

The electronic signboard at Piccadilly Circus, the iconic space in central London, was turned off Monday as part of a monthslong renovation. When the board is back online this fall, one giant screen will replace the six currently used for advertisements. Associated Press/Kirsty Wigglesworth Yui Mok/PA via Associated Press

A general view of the advertising screens at Piccadilly Circus, central London, Sunday Jan. 15, 2017, before they were switched off in preparation for redevelopment. The iconic lights have gone out so that the electronic hoardings can be replaced with a state-of-the-art screen measuring 790 square metres which is expected to be unveiled in the autumn. ()

It’s the longest period of darkness since World War II, when the city’s lights were turned off to confuse German bombers.

The Piccadilly Circus signs were switched back on in 1949, and – power cuts aside – have only been dimmed to mark the funerals of Winston Churchill and Princess Diana.

When the lights go back on in the fall, six separate screens will be replaced with one giant digital screen, which can be used by a single advertiser or divided into sections.

Property company Land Securities, which owns the site, says Coca-Cola and Samsung will be among brands advertising on the signboard.