If you don't want to ruin the lines of your very nice Mosiac then how about a helmet light to compliment what you already have? The Light and Motion VIS 360 is one to consider. Another option would be the Lumos helmet with the built in lights. As said I would use these as an adjunct to what you already have. There is no such thing as being to lit up on the road (within reason). Multiple light sources always helps.