These elements are a vital component of Patrick Doherty's set design. They help set the mood for the UK's perennially popular series - now in its tenth season - which is broadcast live each week during BBC1's Saturday evening prime time, complete with a studio audience of 600.
For this series, around the bottom half of the set (below the balcony) the individual Pea Lights have been fastened in neat rows so they all line up. More, installed in the same way, are also used to line presenter Tess Daly's interview area on the balcony.
(Jim Evans)