1. Full of or characterized by animation, vigor, or courage: a spirited debate. 2. Having a specified mood or nature. Used in combination: high-spirited; low-spirited.
One product of photosynthesis is glucose (sugar), which provides the basis for most food chains. The second product of photosynthesis is oxygen which comes in handy if your happen to be an aerobic organism that requires oxygen for survival.
Photosynthesis used the products of cellular respiration. It converts energy from sunlight into sugars. Cellular respiration needs the products of photosynthesis. in photosynthesis, the plant does not make energy but just transforms light energy into food energy (convervation law 1 ).