These min./max. values are all temperature related. The highest numbers are for 25°C and the lowest are for 95°C. Other numbers are for nom. temp which is 65°C with no heatsink.
When the strips are running hot they take only 43,7v at 1120mA and when you switch the light on with normal ambient temps they need up to 48,4v at 1120mA until they reach thermal eqilibrium. Same goes for the wattage, hot Tcase less watts and less efficiency, cool Tcase more watts more efficiency.
For this reason we want the Tcase always as low as possible.
If you mount F-strips on alu C-channels they stay around 45-50°C at 1120mA and therefor you need to calculated with >46v.
Probably ~47v per strip and 48v when switched on.