This was my original thought in changing them because they might add some safety because they do look so different than the white light and maybe they would catch more distracted eyes. But my boss (wife)
disagrees. She thinks th stock lights are much brighter than the yellow bulb. I had them on another bike and I honestly don't think they cast more light at night. Only added the "different" light color. I wouldn't mnd hearing other opinions if anyone else thinks they add or not to the vision factor of a MC.