David wants to be able to control his lights with his mobile phone. Leo says he can with so called "smart lightbulbs" that are part of the Internet of Things. But because they connect to his network, they have a huge vulnerability that allows hackers to get into his network through the light bulb.
Steve Gibson has a workaround with three routers that create a secure network for your computers and a secure network for the internet of things. Steve Gibson talks about how to do that at grc.com. He'll need the Edge Router X by Ubiquity. There's also a piece on TWiT's show Know How at twit.tv/kh.