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Light-independant reactions(Dark Reactions) use Carbon Dioxide and other compounds to create Glucose.
What is obvious from that is the connection to the light reactions. The Calvin cycle needs NADPH and ATP from the light reactions. Thus the Calvin cycle is inseparable from the light reactions...they only occur in the light! This is why dark reactions is a poor name for the Calvin cycle. This relationship with the light reactions is reciprocal...the light reactions need a supply of ADP, P i, and NADP + which come directly from the Calvin cycle: