ATP, NADP, and OXYGEN are the three chemical products of the light reaction in which the ATP and NADP get passed on to the Calvin Cycle and the OXYGEN is the one that leaves the leaf. Adenosine triphosphate or ATP is defined by the biology as the energy currency of life, Nicotinamide denine dinuleotide phosphate or NADP it is define as a coenzyme that occurs in many living cells, and Oxygen with the chemical symbol O is defined as odorless, colorless and a gaseous element constituting about one-fifth of the volume of the atmosphere and present in a combined state in nature.