Originally Posted by WWONG
Don't know how a tint reader works, but maybe your windows were hella dirty and screwed it up, or maybe you have some weird quality tint made of ceramic or something that made it glitch, who knows. Challenge in court
You assume that is the meter he used, there are cheap tint meters which do not have their own light source. Also, and probably correct he was using a portable unit which means it runs on batteries and if the batteries were low it could have low output from the light source if he happen to be using it.
Personally, I rather fight a ticket just so I can show the court the officer has not idea what he is doing.
To the op if you have information from the installer the tint is legal and he can measure it for you and show it it legal I would take it to court and make the officer prove him meter is correct and calibrated.