The humble electric light bulb - a perennial favourite in Top 10 lists of inventions that have changed the world - is truly one of the greatest inventions of all times. Lighting technology has progressed since the first incandescent light bulb changed the way people spend their nights. Today, many countries are actively incentivising the use of light-emitting diodes (LEDs) as they last longer, and are vastly more energy efficient and dynamically adjustable
than traditional incandescent lamps.