Cutting energy costs by fiddling with streetlights is something that's seen debate in the United Kingdom. Turning them off entirely isn't exactly a great option, of course, but there's little that can be done with the infrastructure as it currently exists beyond flipping them off and on. Westminster City Council is looking to change all that. Over the next four years, they'll be switching their 14,000 streetlights to smart alternatives capable of being controlled by an iPad, saving the council hundreds of thousands a year.