Lamp and control device thereof

The utility model discloses a lamp and a control device thereof, and the device comprises a light source; the light sensor is used for acquiring the brightness of the light source and generating a brightness acquisition value; the data processor is used for generating a brightness actual value of the light source according to the brightness acquisition value, the position of the light sensor and the position of the light source, and comparing the brightness actual value with a brightness theoretical value of the light source to generate a switch control signal; and the switching power supply is respectively connected with the light source and the data processor, and the switching power supply is switched on or off under the control of the switching control signal, so that the brightness ofthe light source is stabilized within a set range near a brightness theoretical value. Therefore, the switching power supply is controlled to be switched on or switched off according to the switch control signal, so that the