You're upset enough about this to start another thread, so, you're not going to like my reply. Can't help that, but it seems to me that you are over the line on this. I mean you no harm, but your tint measured out to 5 percent visibility, and you "knew that". Well then, dude, you are out of line.
Window tint is a lot like DUI. The evidence presented against you in court by the LEO, is much less than what you think is defined by a machine.
In legit DUI enforcement, the officer observes your behavior. Slurred speech, fumbling manuevers, loss of balance, stupid remarks, and so on. It's his observations and notes of your behavior that will be presented to the court as evidence of your impairment. The breathalizer is just a machine that identifies alcohol as the cause of impairment, and BAC reveals the degree of your intoxication. Impairment and intoxication are two different issues, but both are key to a DUI conviction, follow me?
When the FHP cop drove up beside you before you were stopped, he was probably wondering if you were one of the FHP Marauders, and when he couldn't tell that, he should be making an observation of the effect of your degree of tint. If he could not see through your tint sufficient enough to be able to identify you as an FHP Marauder, or, identify you at a later time, maybe in a line-up, or, by photo, this should be his probable cause for the stop, the ticket, and I would expect his testimony in court.
Once he stopped you, the light meter machine simply fortifies his observation, as the breathalizer fortifies a DUI charge.
What say you against that? If the officer could not see enough of you to identify you another time, your tint is to dark. At 5 percent, you know he can't, so do I, and that's out of line.
Since he followed you for a while after he wrote the ticket, he may have wanted to see more (or, less) visibility, and how that changed in a different light. Moreover, LE computers may have been down too, and he should keep an eye on you until you clear. I've had delays that took me to the driver's front door, but when he walked in, I knew where I could start a search if he had warrants. Sometimes, it's that way for a reason.
I don't live in FLorida, but I've been there. Arizona too, both quite often. I know the value of a heavy tint, but I know the risk of too much tint too. Do you really believe you can survive a battle with the law over this? They will write you again, you know, and you'll be back in court too. Please, just get legal, and deal with the Sun as we all do.
No flame meant, just my .02C...Carry on?
I love my 5%. I don't like people looking at me. When I get pulled over, for the officer's safety, I roll down all 4 of my windows. 
opcorn: 
