LED lights are very cost effective. The average home has around 40 incandescent lightbulbs which, if replaced with LEDs could result in an energy cost saving of around £250 a year.
LED stands for 'light-emitting diode'. LEDs are tiny semiconductors (diodes) wrapped in plastic to protect the elements and focus light.
LEDs do not give off as much heat as a traditional Incandescent bulb so they're ideal for modern mood lighting displays where light strips are recessed into ceilings.