from the horses mouth : florida tint laws.
Windshield: Non-reflective tint is allowed along the top of the windshield above the manufacturer’s AS-1 line.
Front Side Windows: Must allow more than 28% of light in.
Back Side Windows: Must allow more than 15% of light in.
Rear Window : Must allow more than 15% of light in.
and im aware black on black gets hot. ive been in florida in the ballheat of summer with my GTI, the only time i used my AC in it.