Abstract: A lamp base holder, a lamp, and a method for adjusting an angle of a lamp body are provided. The lamp base holder includes a lamp base neck, a lamp cap, and a fixing pin. The fixing pin penetrates the lamp base neck and the lamp cap. The lamp base neck is provided with a first circuit board and a second circuit board. The first circuit board is provided with a first conductive region. The second circuit board is provided with a second conductive region. A first propping pin is connected to the lamp cap or the fixing pin. One end of the first propping pin is constantly abutted against the first conductive region. A second propping pin is further connected to the lamp cap or the fixing pin. One end of the second propping pin is constantly abutted against the second conductive region.

Abstract: A lamp base holder, a lamp, and a method for adjusting an angle of a lamp body are provided. The lamp base holder includes a lamp base neck, a lamp cap, and a fixing pin. The fixing pin penetrates the lamp base neck and the lamp cap. The lamp base neck is provided with a first circuit board and a second circuit board. The first circuit board is provided with a first conductive region. The second circuit board is provided with a second conductive region. A first propping pin is connected to the lamp cap or the fixing pin. One end of the first propping pin is constantly abutted against the first conductive region. A second propping pin is further connected to the lamp cap or the fixing pin. One end of the second propping pin is constantly abutted against the second conductive region.

Abstract: A drive circuit is configured to electrically connect a LED lamp module to a ballast, which is a high-intensity discharge lamp constant-wattage autotransformer ballast. The drive circuit has a bridge rectifier, and a reactor element electrically connected to the bridge rectifier, wherein the bridge rectifier consists of four rectifiers connected in a loop. The bridge rectifier has two AC inputs and two DC outputs. The DC outputs are connected to two ends of an LED lamp module. The two AC inputs are electrically connected to the outputs of the ballast with a series inductor, a series capacitor or a parallel inductor.