PURPOSE: To provide a security lamp device by which is lighted only when necessary to restrict consumption of a storage battery.
CONSTITUTION: A heat ray radiated from a human body is detected by a heat ray sensor 13. An environmental illuminance is detected by an illuminance sensor 14. The output of the heat ray sensor 13 is made to be effective only when the environmental illuminance detected by the illuminance sensor 14 is no higher than a predetermined level and a control signal is output in the signal process part 91 of a control circuit 9. The thyristor SCR of a lighting circuit 8 is conducted by the control signal through an output circuit part 9b. When the thyristor SCR is conducted, a transistor Q1 is turned ON, and current is supplied thereto from a nickel cadmium battery 5, and a bulb 6 is lighted. The bulb 6 is lighted only when necessary while the bulb 6 is turned off when unnecessary and depletion of the nickel cadmium battery 5 charge can thus be restricted.
NISHIOKA YASUSHI
KITAGAWA KATSUNORI
