House building construction illuminating lamp

The utility model discloses an illuminating lamp for house building construction. The lamp comprises a lamp body, placing grooves are formed in the two sides of the lamp body. A fan used for cooling the lamp body is arranged on the containing groove of the lamp body. A detection circuit used for detecting the temperature of the lamp body and outputting a detection signal is arranged in the lamp body. The lamp body is provided with a PWM circuit which controls the rotating speed of the fan and outputs PWM signals. Wherein the detection circuit and the PWM circuit are electrically connected witha comparison circuit which is used for presetting a temperature reference value, receiving a detection signal and a PWM signal and outputting a comparison signal, the comparison circuit is electrically connected with a control circuit which is used for receiving the comparison signal and outputting a control signal, and the control circuit is used for controlling the rotating speed of the fan. The temperature of the lamp