Some great insight here. A lot of the road crews and emergency workers are in that yellow/green color combo now and indeed it is pretty visible most anywhere. One area I noticed where white caused grief was in urban areas where it blended in with light colored brick, siding, store signs, etc. Pretty obvious other colors best there. The bike light fixation theory is interesting and food for further thought. I never ride at night where it would be a no brainer. Day use, I'll sit on the fence for now. Might snag some type of shirt/jersey with that electric green for piece of mind in urban areas, white for on the road in rural green areas. Great discussion all, thanks for sharing