LED bulbs are not only more energy-efficient than the incandescents they're slowly making extinct, they also run cool to the touch. Which means if you're bored by their uninspired shape, you can snap on these wonderful 3D-printed hanging skyscrapers that glow like stalactites, turning your living room into an art-deco oasis.
At around €199/£147 a pop, though, available from Layers in Design, you have to really, really hate the look of a standard LED lightbulb. That, or really, really love architecture and the high-rise skyscrapers that are the hallmark of modern metropolises. [Studio David Graas via Freshome]