When water is split in the light reaction h+ ions, electrons and oxygen gas is "made."
When water is split in the light reaction CO2, H2O, and O2 is "made."
The light reaction transfers the energy of incoming photons to energy-carrying molecules like adenosine tri-phosphate.
The light reaction produces ADP and NADP+ and send these molecules to the Calvin cycle.
ATP is made in the thylakoid when H+ ions flow through the ATP synthase in the thylakoid membrane.