I ride a 3/4 helmet with bobster roadmaster photochromatic. Theyre dark enough for me in sunlight, I dont know why anyone would want them darker. The downside to them is they dont get totally clear at night and can be a bit darker than you want when riding dark back roads. On highways or roads with streetlights you'll never notice unless you take them off.
I have a large nose and bridge by the way, and they fit me perfect and hold the wind out very good. I'm on my second pair since May 07.
