It all starts with changing a bulb. The table lamp that you sleep next to can now change colours, respond to voice commands and be controlled through a smartphone from anywhere in the world. Perhaps the lamp on the other side of the bed should also change from a bright white to a warm yellow in sync with this one, or maybe you can finally put an end to that fight. Some hearty banter between mum and dad, two chirpy children and a lot of laughter in the living room… Advertisements paint such a happy picture. A bulb changed here,