Provided is a cross-country running lamp which includes a lamp body, at least two lamp heads and at least one switch. The lamp heads are disposed on a peripheral side of the lamp body for illumination. The switch is disposed on the lamp body for controlling on-off and brightness of the lamp heads.

A portable light and assembly method may comprise: a light body supporting a source of electrical power and a light head having a light source that produces light. A rotating joint may include: a hollow cylindrical central member extending from one of the light body and the light head in a cylindrical bore of complementary size and shape in the other of the light body and the light head, a fastener retaining the hollow cylindrical member in the cylindrical bore, and one or more electrical conductors extending through the hollow cylindrical member of the rotating joint to connect the source of electrical power to the light source. A hinged cover has a latch including an arm member engaging a feature of the light body or including a thumb screw engaging a threaded hole of the light body, to retain the closed cover against the light body.

A portable light may employ a light source positioned adjacent an optical element. The light source may be configured as a light emitting diode generating light with a wavelength primarily within the range of 530 nm to 700 nm with a relative peak intensity of 550 nm to 650 nm. The optical element may be configured to manipulate the emitted light into a beam or other light pattern having specific characteristics such as a certain diameter and/or shape, a certain amount of spill, and/or a certain amount of backscatter. Certain embodiments may be especially useful for emergency and rescue operations performed under conditions such as fire generated smoke.

A lighting device is disclosed having a plurality of light emitting diodes of varying light intensities disposed about the same substrate. A lens is configured with a geometry that corresponds to different sections of the substrate containing the light emitting diodes of different light intensities.

A lighting apparatus for use as a surgical headlamp is disclosed. A light emitting diode is positioned in a recess within a frustoconical, thermally-conductive heat sink that has a several circumferential ridges to provide a desired surface area for heat transfer. The diode and the heat sink are provided in a housing that also includes a fan for drawing ambient air into the housing to contact the heat sink and exhausting heated air. A lens is snap-fit into a slide that frictionally engages the interior of the housing, allowing a user to adjust the spacing between the light emitting diode and the lens as desired. Personal cooling apparatuses usable with the lighting apparatus are also described. Auxiliary undergown switches are also described as are personal cooling apparatuses.

A flash housing for photographic purposes is disclosed. The flash housing comprises a flash forming element arranged to generate a flash light and a lens element arranged to let at least part of the generated flash light out of the flash housing so as to obtain the flash. The obtainable flash light has a beam lobe with a controllable beam angle. A simulation light generator element is arranged for simulation of the obtainable flash light beam lobe having the controllable beam angle.

A lighting apparatus for use as a surgical headlamp is disclosed. A light emitting diode is positioned in a recess within a frustoconical, thermally-conductive heat sink that has a several circumferential ridges to provide a desired surface area for heat transfer. The diode and the heat sink are provided in a housing that also includes a fan for drawing ambient air into the housing to contact the heat sink and exhausting heated air. A lens is snap-fit into a slide that frictionally engages the interior of the housing, allowing a user to adjust the spacing between the light emitting diode and the lens as desired. Personal cooling apparatuses usable with the lighting apparatus are also described. Auxiliary undergown switches are also described as are personal cooling apparatuses.

Optical system (2) for a spotlight (S), comprising a first optical element (3) and a second optical element (4), which are arranged optically one behind the other along a light-radiating axis (A), and an adjustment mechanism (5), which is coupled to the first optical element (3) and the second optical element (4) such that it can move the optical elements (3, 4) along the light-radiating axis (A) in such a way that the optical elements (3, 4) can be moved relative to one another between a distanced position, in which the optical elements (3, 4) are spaced apart along the light-radiating axis (A), and an adjacent position, in which the optical elements (3, 4) are arranged closer to one another than in the distanced position, and wherein the adjustment mechanism (5) is further coupled to the first optical element (3) and the second optical element (4) such that the optical elements (3, 4), when they are in the adjacent position, can be moved together along the light-radiating axis (A) while maintaining said adjacent position. The invention also relates to a lighting system (1) comprising a spotlight (S) and the optical system (2) according to the invention, and to a method for adjusting a light emission characteristic of a spotlight (S) of the lighting system (1).

An adjustable carrier structure for a lamp is described. Said adjustable carrier structure comprises an optical component carrier on which an optical component may be fastened, a coupling device for fastening the carrier structure on the lamp, and at least one threaded spindle. The latter comprises a first threaded spindle end that is mounted in an axially-fixed and non-rotatable manner on the optical component carrier, and is connected to the coupling device via a threaded socket that cooperates with the threaded spindle. In this case, the threaded socket is connected to the coupling device in an axially-fixed and rotatable manner. The threaded spindle extends essentially parallel to an optical axis of the adjustable carrier structure. A distance may be set between the first threaded spindle end and the coupling device by means of rotating the threaded socket. Moreover, a lamp having a carrier structure of this type is proposed.

The invention relates to a torch having a housing in which at least one LED secured to a carrier element, and a lens system, are arranged and can be displaced relative to one another in order to focus the cone of light that is emitted. According to the invention, a seal consisting of a membrane (14) closes the space (23) between the LED (11) and the lens system (13) in a watertight and dust-proof manner.