Spinach plants grown in the winter field experienced stress from high light and freezing temperatures. Frost at night caused damage to photosynthesis, but the plants recovered after a few days. Exposure to bright light at cold temperatures led to photoinhibition, where excess light energy was dissipated to protect the plants. The photoinhibition was reversible in warmer temperatures and low light conditions. The study showed that the freezing stress did not make the photoinhibition worse, and the plants were able to recover from the light stress.