Abstract: An external electrical-control lamp with improved structure includes a light-emitting diode lamp (1), an external power box (2), and a dimmer (4). The light-emitting diode lamp (1) has a circuit board (11), at least one light-emitting diode (12), a thermal module (13), and a rectifying circuit (14). The light-emitting diode (12) is installed on the circuit board (11), the thermal module (13) provides a heat-dissipating function to the light-emitting diode (12), and the rectifying circuit (14) provides a rectified power to the light-emitting diode (12). When a utility power (3) is supplied to the dimmer (4) and the external power box (2), a variable resistor of the dimmer (4) is adjusted and the utility power (3) is controlled by the external power box (2), thus adjusting the brightness of the light-emitting diode (12).

Abstract: The emergency light of the invention includes a base (1), a lighting module (2), a rechargeable battery (3) and a retractable support (4). The base (1) has a back (11) with a trough (111). The lighting module (2) is installed in the base (1) and electrically connects a lighting device (21) and a circuit board (22). The rechargeable battery (3) is installed in the base (1) and electrically connects the circuit board (22). The retractable support (4) is pivotally connected to the back (11) and received in the trough (111).

Abstract: A lamp holder structure includes a base body, two electrode plates, a rotary shaft, a short-circuit part, and a cover. When multiple sets of lamp holder structures are used in serial connections, a shaft part of the rotary shaft is rotated by rotating a lamp-tube for the lamp holder structure. Conducting terminals of the lamp-tube are electrically contacted with the two electrode plates. Before rotating the lamp-tube, the short-circuit part is electrically contacted with the two electrode plates. After rotating the lamp-tube, the short-circuit part is electrically contacted with one of the two electrode plates. The electrical connection between the two electrode plates is achieved by the lamp-tube. When the lamp-tube is removed, the lamp-tube is rotated again, so that the short-circuit part is electrically contacted with the two electrode plates, and the two electrode plates are short-circuited. The power could be transmitted to the next lamp holder structure.