There are many important technical differences between LED lighting (sometimes referred to as solid-state lighting) and traditional lighting. These include many differences that are difficult to see such as increased efficiency, which results in less energy being used to operate the lights, or the conversion of AC current to DC current that's occurring internally in the circuitry
Another of the most obvious differences that occurs immediately when you turn on an LED light is the simple fact that the light turns on essentially immediately. In contrast, many traditional lights can take several seconds up to many minutes to turn on, and even longer if they are turned on and off, then back on again.
So, why is this?