These are Quality Aurora branded round electronic 50-150Watt transformers, which are equivalent to the Eagerlise SET150CS 50-150Watt that are frequently found in BHS and ARGOS halogen light fittings They are fully dimmable with most brands of resistive and inductive dimmer switches Minimum load for dimming 75Watt Meets European Safety standards Suitable for integration into luminaires for example in desk lamp or floor lamp bases, low voltage bar/plate lights or for surface mounting Surge Protected providing increased protection against surges on mains supply, improved reliability and also a longer life Offers a 5 year guarantee