| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED lamp which allows for determination whether or not an LED lamp is mounted on a lighting device for LED, and which does not cause heat generation or impairment when it is mounted erroneously on a lighting fixture for straight fluorescent lamp.SOLUTION: In an LED lamp, the impedance of a circuit on the LED lamp side is different from any of the impedance of a fluorescent lamp in filament normal state, and the impedance in filament abnormal state. The circuit on the LED lamp side has a resistor for measurement connected with two terminals at both ends, and the resistor for measurement has a resistance different from any of the resistance of a fluorescent lamp in filament normal state, and the resistance in filament abnormal state. |
