Conventional low voltage transformers, also called magnetic core &
coil low voltage transformers can be extremely large and heavy, consist
of an iron core and two sets of wires. An electronic low voltage transformer, on the other hand,
also contains an electronic device, called an inverter, which allows
the size of the low voltage transformer to be substantially smaller. Electronic low voltage transformers are very small and light compared
to magnetic low voltage transformers, in most cases small enough that
fixture manufacturers can often incorporate them within their lighting
fixture rather than leaving the customer to find a hiding place. Even
when not incorporated within the lighting fixture an electronic low
voltage transformer is very easy to install in a small hidden location.