The LED light has been lighting up city streets and decorating Christmas trees for half a century.
It was invented in October 1862, 50 years ago by Nick Holonyak.
LEDs (Light emotting diode) power: christmas lights, tvs, the brake lights from your car.
LED’s are electronic lights, not thermal (like the first light bulb), so they are faster and more cost effective; they produce electronic light.
How it works, there is a positive current and a negative (diode) separated by a gap, when energy flows, it produces light. Depending on the material used for the diode, it takes on color, like red, green or even blue. LED light bulbs have come a long way and last up to 22 years!