Attic Condensation Via Spray Foam Flaws and Pot Light

Spray foam is usually sold as "The Silver Bullet" that promises to fix nearly every building flaw. Spray foam is an amazing material, but it's only as good as the installer. I always say "Hire the guy pulling the trigger on the spray gun, not the foam brand or contractor."
In the case above, the attic floor had many holes that leaked air from the living space into the attic space as driven by winter-time stack effect. This moist air then condensed as it hit cold roof sheathing and undersides of roof vents. The fix: Seal the holes!
The guy pulling the trigger controls the manufacturing process and performance of the end product: in situ spray foam. If you're installer treats their equipment well, knows the limitations of the foam and has some building science knowledge your off to a good start.

[@davidhazen2394]

Lol I am not surprise. You sprayed the foam on the attic floor. Everyone I know sprays the bottom side of the roof decking

[@denking7024]

Please do not blame an improper install on a product. This is a flawed generalization.