Time Out says
Recharge your batteries with a minute and a half in an immersive light show
Need a break from shopping till you drop? Until March you can pop into a free pop-up light experience room for a 90-second recharge.
Day Dream was created by Phillip Bucknell and Jobe Williams and comprises a fairly small room with beanbags in each corner. Up to four people can enter the room at a time to experience the show. Take a seat on a beanbag, look up, and soon the show begins. Colours pulse and chase each other across the 20,000 lights embedded in the walls and ceiling, while a trance-like techno beat plays. There are four different variations – End of the Rainbow, Into the Wild, Deep Space and Summer Solstice – and the show changes as the season progresses.
The room is open from 11am-3pm, Tuesday through Saturday. It's free, but there might be a bit of a queue.