1. Light-dependent reactions:

* Main energy storing product: ATP (adenosine triphosphate). This is the primary energy currency of cells.

* Secondary energy storing product: NADPH (nicotinamide adenine dinucleotide phosphate). This carries high-energy electrons that will be used in the next phase.

2. Light-independent reactions (Calvin cycle):

* Main energy storing product: Glucose (C6H12O6). This is a sugar molecule that serves as the main source of energy for cells and building blocks for other organic molecules.

Here's a breakdown:

* Light-dependent reactions capture light energy and convert it into chemical energy stored in ATP and NADPH.

* Light-independent reactions use the ATP and NADPH produced in the first stage to convert carbon dioxide into glucose, storing energy in the chemical bonds of the glucose molecule.

So, while both phases of photosynthesis produce energy-storing molecules, the primary product of the light-dependent reactions is ATP, while the primary product of the light-independent reactions is glucose.