In a write up investigation we found this graph.
This shoes the different levels of light intensity and how it affected the rate of reaction with the enzymes that are used in photosynthesis. Because the more heated light the more heat.

As you can see the blue line which is not the highest intensity gave the enzymes the most energy, but the brown line (which is the highest) is too much which is de naturing the enzyme which then doesn’t allow the enzyme to use the lock and key mechanism which slows down the reaction.

Here you can see the lock and key mechanism which is used to create the end result: sugar.
But when the heat from the sunlight reacts on this it changes its speed and the quicker the lock and key collide together the quicker it can create the sugar which then fuels photosynthesis quicker. But when it gets to hot which it shows in the first graph its starts to de nature the lock and key edges shown in this diagram:

Conclusion:
To conclude the more heat the faster the enzymes react but too much it denatures.