Standard shades are as follows: 35%/20%/5%. The typical configuration for a sedan is 35% 2-Fronts / 20% Rears. In Texas, the shade level of the two front windows are regulated and the shade cannot be darker than 25%, the rear windows are not regulated. We always install a 35% tint film on the fronts to ensure compliance with the law (window glass itself naturally has shading, so when 35% is installed, usually your overall reading is around 30%, just above the legal limit). While you may install whatever configuration you wish, we typically recommend against using Limo tint or 5% on the rears, as it is difficult to see out of at night.