Light adjustment device, photography light, and photography system

A light adjustment device, comprising:

• a mounting component, internally forming a mounting cavity, the mounting component being provided with a plurality of heat dissipation holes communicating with the mounting cavity;
• a lens barrel, comprising a barrel body and a lens, with one end of the barrel body located inside the mounting cavity and the other end located outside the mounting cavity, and the lens being disposed within the barrel;
• and
• a heat dissipation component, disposed at one of the heat dissipation holes, the heat dissipation component comprising a motor and fan blades connected to the motor, to discharge heat from the mounting cavity and the lens barrel to the exterior through flowing air;
• wherein the light adjustment device further comprises a thermoelectric generator, disposed on the mounting component and electrically connected to the motor;
• one end of the thermoelectric generator is in contact with air inside the mounting cavity, and another end is in contact with the air outside the mounting cavity, so as to generate a temperature difference between the two ends of the thermoelectric generator and convert thermal energy into electrical energy;
• and
• the mounting component is provided with a first mounting hole, the first mounting hole is arranged at one end of the mounting component away from the lens and communicates with the mounting cavity, and the thermoelectric generator is arranged at the first mounting hole.