Uninterrupted power for an array of luminaries. The EN-12150-R-AR Electronic Transformer 12V 150W by WAC Lighting is designed for use in properly listed closures and as a replacement for installed transformers. While converting electricity from 120V to 12V, the system reverts to a hold position when there's a short circuit or system overload and resets automatically once safe. This soft start delays the sudden rush of current to the light bulbs and, as a result, may increase their life.