Patent ID: 7322718

Claim:
A lighting device including a plurality of LED modules, each LED module in the plurality of LED modules comprising: a main substrate; an LED mounting unit composed of one or more LED bare chips mounted on a main surface of the main substrate; a power supply terminal provided on the main surface of the main substrate, and operable to receive power from an electric power source; a luminous intensity stabilization circuit connected electrically to the power supply terminal and the LED mounting unit; and a thermal element unit connected to the luminous intensity stabilization circuit, and including a thermal element and a first comparator provided in a vicinity of an area in which the one or more LED bare chips are mounted, wherein when at least one of the LED bare chips in any one of the LED modules rises in temperature to a predetermined temperature or higher, the luminous intensity stabilization circuit stops current to the one of the LED modules independently from any other of the LED modules in the plurality of LED modules, according to a judgment signal from the first comparator based on detected temperature information from the thermal element, and each of the LED modules is individually detachable from the lighting device.