The lights are based on the old fairground lighting, made from steel and with an option of either a rust or industrial finish. You can use as freestanding single lights or you can use a transformer to link together up to five lights for maximum effect. You can also power each with batteries too.
As for the range, that looks to include every letter of the alphabet, as well as some punctuation and the odd shape (like a heart or arrow for example). The standard size is 13 inches tall, but there is now a ‘mini’ range too, with those lights coming in at 9 inches.
Obviously that means a price difference too. The mini range sells for £30 each, while the standard retails for £60 each. See all the range at the retailer’s site.