What is an LED bulb anyway?

Incandescent light bulbs were phased out a few years ago, and

most people now use halogen or CFL (compact fluorescent lamp) bulbs, which are more energy-efficient. However, smart bulbs all use the latest LED (light-emitting diode)

technology, which is even more efficient

and can last up to 25 years. Smart bulbs can do multi-colour

disco lighting, too!