The evolution of LED lights allowed us to use them more frequently and in a wider range of applications. Their performance has grown into light bulbs that can fully replace energy wasting incandescent lights. Light emitting diodes run on mains (230V), but low voltage 12V LED light s cannot directly run at 220V, which is another reason why transformers are often necessary.

Fortunately, many LED light bulbs already contain a driver and chip in their fixtures and therefore they can replace traditional bulbs with a twist and turn movement. These LED bulbs run at main voltage, so they do not need the application of transformers.

Low voltage LED lights, running at 12 or 24 volt however do need transformers, which are not always easy to choose.

There are basically two types of transformers: the traditional magnetic / wire wound one, and the electric one. Although they both reduce voltage, so the final outcome is the same, electronic transformers are not suitable for 12V LED lights in most cases. The reason is their lack of reliability, since they often do not contain fuses; therefore the rate of fluctuation is too high. Transformers for 12V LED lights always have to be stabilized, with a minimal fluctuation, which lengthens the lifespan of LEDs.