Red lens requirements are State/County specific, so to be safe you should stick with Red in the Rear (that doesn't sound good does it?). I went with red in back just because I didn't want to possibly be at the mercy of whichever township's finest who had a bad day and really wants to issue that ticket... But Bill, I think white bulbs will be fine, although I do love how rich the amber light is in my front signals. Without a luminosity/color gauge to quantify, I think it's mostly academic though. Hell, clear incandescents worked fine until some idiot started a thread about LEDs!