6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂

This equation represents the overall process of photosynthesis, where:

* 6CO₂ (six molecules of carbon dioxide) and 6H₂O (six molecules of water) are used as reactants.

* light energy is absorbed by chlorophyll and other pigments.

* C₆H₁₂O₆ (one molecule of glucose, a simple sugar) is produced as a product.

* 6O₂ (six molecules of oxygen) is released as a byproduct.

This equation is simplified as it doesn't represent the complex series of reactions that occur during photosynthesis. However, it provides a basic understanding of the inputs, outputs, and energy requirements of this essential process.