Final answer:
ATP and NADPH are the two products from the Light Dependent Reactions that are used in the Light Independent Reactions of photosynthesis, where they contribute to the synthesis of sugars.
Step-by-step explanation:
The products of the Light Dependent Reactions that contribute to the Light Independent Reaction Cycle are ATP and NADPH. These are forms of chemical energy that are produced during the light-dependent phase of photosynthesis. The ATP and NADPH generated are then used to power the light-independent reactions (also known as the Calvin cycle or dark reactions), which fix carbon dioxide (CO2) into organic sugar molecules.