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I believe what you are seeing is called ghosting. The dots of light correspond to a vertically and horizontally reflected image. So a point of light in the top left would “ghost” to the bottom right. Incidentally, I can tell from this image that the centre of the lens is not in the centre of the image. This could be because it was cropped just a bit on the top and right, or it could be that the lens is slightly off-centre (not a dramatic problem, by the way).
Ghosting is a common problem with UV filters, but can also occur with the actual lens, especially older lenses without the fancy coatings. Did you have a UV filter on when taking the picture?