A lighting device with a light source powered by batteries connected in series utilizes a current-limited load switch which regulates current delivered to the light source from the batteries through use of a controller electrically coupled in series with a mechanical power switch so that when the mechanical power switch is opened, the controller is not powered by the batteries, the controller including an output for providing a control signal for controlling the opening and closing of the current-limited load switch, and current delivered to the light source by the current-limited load switch is set by a resistor connected to an ISET pin of the current-limited load switch.

A lighting device with a light source powered by batteries connected in series utilizes a current-limited load switch which regulates current delivered to the light source from the batteries through use of a controller electrically coupled in series with a mechanical power switch so that when the mechanical power switch is opened, the controller is not powered by the batteries, the controller including an output for providing a control signal for controlling the opening and closing of the current-limited load switch, and current delivered to the light source by the current-limited load switch is set by a resistor connected to an ISET pin of the current-limited load switch.

A microscope apparatus includes: a light source configured to emit illumination light to illuminate a specimen; a dimming input unit configured to set and input a light amount of the light source in a predetermined dimming range; a switching unit configured to switch a first instruction value instructing the light amount of the light source to a second instruction value larger than the first instruction value when a switching signal to switch the light amount of the light source is input; and a control unit configured to control a light amount of the illumination light emitted from the light source according to the first instruction value set and input by the dimming input unit or the second instruction value obtained by switching by the switching unit.

A microscope apparatus includes: a light source configured to emit illumination light to illuminate a specimen; a dimming input unit configured to set and input a light amount of the light source in a predetermined dimming range; a switching unit configured to switch a first instruction value instructing the light amount of the light source to a second instruction value larger than the first instruction value when a switching signal to switch the light amount of the light source is input; and a control unit configured to control a light amount of the illumination light emitted from the light source according to the first instruction value set and input by the dimming input unit or the second instruction value obtained by switching by the switching unit.

A power drawing device using a single live wire includes a first and second mechanical switches, and a power drawing circuit, wherein the first mechanical switch includes a first contact connected to a live wire, a third contact connected to a first light adjusting circuit, and a fifth contact connected to the first light adjusting circuit; the second mechanical switch includes a first contact connected to the live wire, a third contact connected to a second light adjusting circuit, a fifth contact connected to the second light adjusting circuit, and a sixth contact connected to the first mechanical switch; and the power drawing circuit includes a first terminal connected to the live wire, a second terminal connected to the second mechanical switch, a third terminal connected to the first light adjusting circuit, and a fourth terminal connected to the second light adjusting circuit.

A power drawing device using a single live wire includes a first and second mechanical switches, and a power drawing circuit, wherein the first mechanical switch includes a first contact connected to a live wire, a third contact connected to a first light adjusting circuit, and a fifth contact connected to the first light adjusting circuit; the second mechanical switch includes a first contact connected to the live wire, a third contact connected to a second light adjusting circuit, a fifth contact connected to the second light adjusting circuit, and a sixth contact connected to the first mechanical switch; and the power drawing circuit includes a first terminal connected to the live wire, a second terminal connected to the second mechanical switch, a third terminal connected to the first light adjusting circuit, and a fourth terminal connected to the second light adjusting circuit.

A method of managing the power dissipated by an electroluminescence light source including electroluminescent rods having submillimeter dimensions protruding from a substrate and split into a plurality of identical groups. By using the measures of the invention, it becomes possible to manage the dissipation of power from the light source when faced with instantaneous variations in the strength of the electric current that powers the latter.

A power drawing device using a single live wire includes a first and second mechanical switches, and a power drawing circuit, wherein the first mechanical switch includes a first contact connected to a live wire, a third contact connected to a first light adjusting circuit, and a fifth contact connected to the first light adjusting circuit; the second mechanical switch includes a first contact connected to the live wire, a third contact connected to a second light adjusting circuit, a fifth contact connected to the second light adjusting circuit, and a sixth contact connected to the first mechanical switch; and the power drawing circuit includes a first terminal connected to the live wire, a second terminal connected to the second mechanical switch, a third terminal connected to the first light adjusting circuit, and a fourth terminal connected to the second light adjusting circuit.

A power drawing device using a single live wire includes a first and second mechanical switches, and a power drawing circuit, wherein the first mechanical switch includes a first contact connected to a live wire, a third contact connected to a first light adjusting circuit, and a fifth contact connected to the first light adjusting circuit; the second mechanical switch includes a first contact connected to the live wire, a third contact connected to a second light adjusting circuit, a fifth contact connected to the second light adjusting circuit, and a sixth contact connected to the first mechanical switch; and the power drawing circuit includes a first terminal connected to the live wire, a second terminal connected to the second mechanical switch, a third terminal connected to the first light adjusting circuit, and a fourth terminal connected to the second light adjusting circuit.

A microscope apparatus includes: a light source configured to emit illumination light to illuminate a specimen; a dimming input unit configured to set and input a light amount of the light source in a predetermined dimming range; a switching unit configured to switch a first instruction value instructing the light amount of the light source to a second instruction value larger than the first instruction value when a switching signal to switch the light amount of the light source is input; and a control unit configured to control a light amount of the illumination light emitted from the light source according to the first instruction value set and input by the dimming input unit or the second instruction value obtained by switching by the switching unit.