These are preassembled and ready to use as pictured. Plug and play installation allows them to be installed with ease and in the same amount of time as installing a standard bulb. No need for an electrician. There is a tendency in the electrical trade to call a new device after the device it replaces, often with the word electronic in front of it, it may be a switched mode power supply or a pulse width modulated power supply but since it replaces a transformer we call it an electronic transformer. MR16 stands for multifaceted reflector diameter 16/8th inch across, the latter is to do with how the early cathode ray tubes were rated.

Below pictures show a GU10 bulb with the adapter inserted into the SGU10 holder and the photo on the right shows the adapter holding a bulb inserted into an Aurora SGU10 fixture. the rules changed, today any 230 volt lamp needs an earth taking to it, even if not used, so there should be an earth at the transformer even if the transformer is class II, and it seems those holders do have an earth connection, so unlikely class II seems class I. This adapter comes in two parts. There is the ring face adapter which sits at the end of the bulb to hold it in the fixture and the GU10 adapter which sits over the top of the bulb to convert the electrical connector and extend the length of the bulb to fit the holder. Compatible with Aurora AU-GUF4011LED/30, AU-GUF4011LED/40, AU-GUF4011/30, AU-GUF4011/40 and all other bulbs/fixtures that use the SGU10 fitting. Related products