The dark phase of photosynthesis, also known as the Calvin cycle, doesn't actually require darkness. It can occur in the presence of light, but it doesn't directly use light energy.

Here are the raw materials needed for the dark phase:

* Carbon dioxide (CO2): This is the main source of carbon for building sugars.

* ATP: This is the energy currency of the cell, produced during the light-dependent reactions of photosynthesis.

* NADPH: This is a reducing agent, also produced during the light-dependent reactions, which carries electrons to the Calvin cycle.

So, while the dark phase doesn't use light directly, it heavily relies on the products of the light-dependent reactions.