What is the limiting factor for photosynthesis at night ?

Factors that affect photosynthesis:

Light Energy/ intensity

Temperature

Carbon dioxide concentration

Therefore I believe the answer to be Light energy as we're talking about night here.

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.