Why you should get ready to say goodbye to the humble lightbulb

Lightbulbs are disappearing. The traditional incandescent bulbs that revolutionised daily life in the 20th century have largely already gone and the energy efficient fluorescent bulbs that replaced them are now also on their way out. In their place, we now have highly efficient light emitting diodes (LEDs), which are small semiconductor devices that produce light when an electric current is passed through them.