An LED lamp tube (82, 92), comprising: an LED driving module (62, 72), four analog filament impedance circuits and at least one LED light emitting element (63, 73), wherein, the LED driving module (62, 72) is coupled with the four analog filament impedance circuits (61, 71), and the at least one light emitting element (63, 73) is coupled with the LED driving module (62, 72), wherein the four analog filament impedance circuits are a first analog filament impedance circuit, a second analog filament impedance circuit, a third analog filament impedance circuit and a fourth analog filament impedance circuit, the first analog filament impedance circuit and the second analog filament impedance circuit being connected in series, and the third analog filament impedance circuit and the fourth analog filament impedance circuit being connected in series, and each of the four analog filament impedance circuits (711, 712, 713, 714) comprises a first resistor (41, 51), a second resistor (42, 52) and a first capacitor (43, 53), wherein the first resistor and the first capacitor are connected in parallel, and then connected in series with the second resistor or the first resistor and the first capacitor are connected in series, and then connected in parallel with the second resistor, wherein each of said first, second, third and fourth analog filament impedance circuits (61, 71) has a pole frequency (fp) and a zero frequency (fz), wherein, the pole frequency (fp) is less than the zero frequency (fz); an equivalent impedance value of each analog filament impedance circuit remains unchanged when an input frequency is less than the pole frequency (fp), and is a first equivalent impedance value; the equivalent impedance value of each analog filament impedance circuit decreases as the input frequency increases when the input frequency is greater than the pole frequency (fp) and less than the zero frequency (fz); the equivalent impedance value of each analog filament impedance circuit remains unchanged when the input frequency is greater than the zero frequency (fz), and is a second equivalent impedance value; and the first equivalent impedance value is greater than the second equivalent impedance value. an LED driving module (62, 72), four analog filament impedance circuits and at least one LED light emitting element (63, 73), wherein, the LED driving module (62, 72) is coupled with the four analog filament impedance circuits (61, 71), and the at least one light emitting element (63, 73) is coupled with the LED driving module (62, 72), wherein the four analog filament impedance circuits are a first analog filament impedance circuit, a second analog filament impedance circuit, a third analog filament impedance circuit and a fourth analog filament impedance circuit, the first analog filament impedance circuit and the second analog filament impedance circuit being connected in series, and the third analog filament impedance circuit and the fourth analog filament impedance circuit being connected in series, and each of the four analog filament impedance circuits (711, 712, 713, 714) comprises a first resistor (41, 51), a second resistor (42, 52) and a first capacitor (43, 53), wherein the first resistor and the first capacitor are connected in parallel, and then connected in series with the second resistor or the first resistor and the first capacitor are connected in series, and then connected in parallel with the second resistor, wherein each of said first, second, third and fourth analog filament impedance circuits (61, 71) has a pole frequency (fp) and a zero frequency (fz), wherein, the pole frequency (fp) is less than the zero frequency (fz); an equivalent impedance value of each analog filament impedance circuit remains unchanged when an input frequency is less than the pole frequency (fp), and is a first equivalent impedance value; the equivalent impedance value of each analog filament impedance circuit decreases as the input frequency increases when the input frequency is greater than the pole frequency (fp) and less than the zero frequency (fz); the equivalent impedance value of each analog filament impedance circuit remains unchanged when the input frequency is greater than the zero frequency (fz), and is a second equivalent impedance value; and the first equivalent impedance value is greater than the second equivalent impedance value.