Lluminars 15% looked like an exact match to me. The place where I had it tinted said it (the factory tint) was 15% also. I don't get hassled for illegal tint, so I put (added) 15% on all the windows (except windshield of course).
thanx, i was thinking of just adding some tint in the front 2 windows, if the back are dark enough. just don't like not having a tint in the front epecially @ night with people who drives with bright lights on.