The laws says any window tinting is illegal on the front windows. So your 5% would be illegal. You could tint your windows but the darker you go the more likely you are to get pulled over. I have pretty dark windows on one of my trucks and I have been pulled over once. But that was when my truck was completly covered in mud, but I cleaned my windows so they stood out to the nice CHP officer. It was just a "fix-it-ticket" at the time, which I got signed off buy a officer friend of mine, so it only cost me $10. As far as I know the law has not changed, you still get a "fix-it-ticket".