In a light-dependent phase, the hydrogen ions are picked up by a compound NADP to from
NADPH
The net-reaction of all light-dependent reactions in oxygenic photosynthesis is:
2H2O + 2NADP+ + 3ADP + 3Pi → O2 + 2NADPH + 3ATP
Thus NADP acts as a final electron acceptor and gets converted into NADPH.