As my screen name implies..I'm in the tint business. Although we are a commercial tinting company, I can h place you all with any confusion in regards to film performance and properties. Tractors and Ceramic film... not the best option for heat rejection. Ceramic films absorb the heat and re-radiate it bake into the cab. When it's installed on a car, the heat is to some small degree blown off the glass as it is moving down the road and what the occupant of the car feels on their skin as heat is the IR portion of the spectrum. That said, IR accounts for such a small amount of TSER it is almost negligible. The only real advantage to a ceramic film is the low reflection. This makes it easier to see out of at night or low light levels. ..Window film does 1 of 3 things with light and heat..it can either absorb it, reflect it, or transmit it. ..some way some how..those 3 metrics will always equal,100% of the solar pie chart.