A topic full of little details which, while not unimportant, can often cloud the bigger picture. So here's my take on it, without the details, but including all the necessary ingredients that help you to understand the process: How the energy from light is used to convert carbon dioxide from the atmosphere into glucose.

There are many questions, still, about this process and exam boards have made numerous simplifications for the A level. So, if you have contradictory info or want to correct me on anything I'm happy to hear your views.