They have a UV solar tint only. Not a visible darkness to it. I bought 32% tint for my car and when pulled over it measured 28% if that matters. Either a flux in the tint itself or the stock windows are tinted very slightly to about 96% (or 4% from 100% visibility).
2012 Oxford White Focus Hatchback
Dyno #'s 164.35 HP 147.12 TQ