I've copied the image above from the Winter Lights website, and don't know which one it is on the map - I shall go and have a look and see if I can spot it next week! You can download the full Winter Lights brochure from the website.
Update 15th January: Now that I've visited you can see my write-up of it here.
Here's the introductory blurb from the website:
Appealing to art lovers, lighting enthusiasts, families, the young and the old, there is something for everyone as soon as dusk falls, and all for free.
Many pieces explore how we communicate in the modern world such as Julius Popp’s bit.fall that taps into live news feeds creating a digital typography waterfall and Bitone’s Totem that responds to the presence of mobile phone signals in the air around it. Other installations such as Jen Lewin’s The Pool encourages viewers to physically touch and engage with it and create visual and audio reactions.
Best seen after 4pm, all the installations and light effects will come alive throughout the evening until 9pm so join us on a dark January night and experience a wealth of inventive and spectacular creativity that will illuminate the Canary Wharf skyline.
Thanks to Florence for asking the installers what it was all about or I would be none the wiser.
Find out more, with a big PDF version of the map with details of the installations, at: http://canarywharf.com/arts-events/events/winter-lights-canary-wharf/?instance_id=