Although we love the fixture, it is buyers beware when installing a wall mounted or ceiling mounted halogen light. Yes, it comes with its own transformer, but that transformer must be placed into the electrical box to which the lamp is installed. The lamp will only mount to a ceiling style octagonal box. The alignment holes will not match a standard rectagonal switch box. Further, if the electrical box has more than one feed entering/exiting, there may be limited space into which to place the transformer. I had to replace electrical wall boxes in order to install the lamps. However, once the transformer is in the wall box, the mounting ring is very easy to attach and the light attaches to the mounting ring very simply at any angle desired (read: you do not have to align the mounting ring vertically or horizontally to get the lamp lined up properly). Once up, the light is beautiful.