A knife assembly includes a handle having a first and second handle portion each extending in spaced relationship with one another between a first and second knife end to define a working gap. A knife blade is pivotably secured to the second knife end and pivotable between a closed and engaged position. A switch button is interconnected to the handle for releasing the knife blade from the closed or engaged positions. A spacer is disposed within the working gap and extends between the first and second handle portions. A vial of tritium is housed within the switch button for allowing tritium produced by the tritium vial to be viewable by a user of the knife assembly.

A knife assembly includes a handle having a first and second handle portion each extending in spaced relationship with one another between a first and second knife end to define a working gap. A knife blade is pivotably secured to the second knife end and pivotable between a closed and engaged position. A switch button is interconnected to the handle for releasing the knife blade from the closed or engaged positions. A spacer is disposed within the working gap and extends between the first and second handle portions. A vial of tritium is housed within the switch button for allowing tritium produced by the tritium vial to be viewable by a user of the knife assembly.

A method for locating an RV in the dark, including extending at least one stabilizing jacks from an RV toward soft ground, engaging at least one phosphorescent jack pad between the at least one jack and the ground, charging the at least one phosphorescent jack pad with daylight, and locating the RV in the dark from the glow of the at least one phosphorescent jack pad.

A method for locating an RV in the dark, including extending at least one stabilizing jacks from an RV toward soft ground, engaging at least one phosphorescent jack pad between the at least one jack and the ground, charging the at least one phosphorescent jack pad with daylight, and locating the RV in the dark from the glow of the at least one phosphorescent jack pad.

An emission enhancement structure having at least one energy augmentation structure; and an energy converter capable of receiving energy from an energy source, converting the energy and emitting therefrom a light of a different energy than the received energy. The energy converter is disposed in a vicinity of the at least one energy augmentation structure such that the emitted light is emitted with an intensity larger than if the converter were remote from the at least one energy augmentation structure. Also described are various uses for the energy emitters, energy augmentation structures and energy collectors in a wide array of fields.

The present invention refers to an ultraviolet light lamp/luminaire system to make phosphorescent or fluorescent material shine in a swimming pool or in any body of water characterized in that it consists of the association of a) at least one defined submersible ultraviolet light lamp/luminaire by a sealed tubular casing defining a trailing end and a leading end; the rear end comprises a waterproof electrical power supply socket or plug and the front end comprises a lens with a waterproof seal, and internally houses a panel of a plurality of ultraviolet light emitting diodes (hereinafter UV LEDs) controlled by an electronic circuit control unit for the UV LEDs connected to the waterproof electrical power supply socket or plug and b) fluorescent or phosphorescent material which may be but is not limited to small aggregate rhinestones, tiles, mosaics, vinyl or fiberglass canvas surface, figures or other objects or accessories, arranged inside the body of water so that they shine in any environment, as long as the ultraviolet light source is on.

The present invention refers to an ultraviolet light lamp/luminaire system to make phosphorescent or fluorescent material shine in a swimming pool or in any body of water characterized in that it consists of the association of a) at least one defined submersible ultraviolet light lamp/luminaire by a sealed tubular casing defining a trailing end and a leading end; the rear end comprises a waterproof electrical power supply socket or plug and the front end comprises a lens with a waterproof seal, and internally houses a panel of a plurality of ultraviolet light emitting diodes (hereinafter UV LEDs) controlled by an electronic circuit control unit for the UV LEDs connected to the waterproof electrical power supply socket or plug and b) fluorescent or phosphorescent material which may be but is not limited to small aggregate rhinestones, tiles, mosaics, vinyl or fiberglass canvas surface, figures or other objects or accessories, arranged inside the body of water so that they shine in any environment, as long as the ultraviolet light source is on.

The embodiments provide a fluorescent rare earth complex having strong emission intensity and excellent durability, and also provide a security medium using the complex. The rare earth complex according to the embodiment comprises a rare earth ion, a diphosphine dioxide ligand and a β-diketone ligand wherein two phosphorus atoms contained in the diphosphine dioxide ligand individually have substituents different from each other.

The embodiments provide a fluorescent rare earth complex having strong emission intensity and excellent durability, and also provide a security medium using the complex. The rare earth complex according to the embodiment comprises a rare earth ion, a diphosphine dioxide ligand and a β-diketone ligand wherein two phosphorus atoms contained in the diphosphine dioxide ligand individually have substituents different from each other.

A wireless lighting control system is provided to create a lighting pattern by remotely controlling a plurality of lighting devices according to groups, thereby improving a lighting effect. The wireless lighting control system includes a first lighting device electrically connected with a first smart device to act as a master, and a plurality of second lighting devices electrically connected with a plurality of second smart devices to act as slaves, respectively. If a group for lighting control and control pattern information according to groups are selected from the first smart device, the first lighting device transmits the control pattern information according to the groups to the second lighting devices through a wireless communication scheme. At least one of lighting units of the second lighting devices and display units of the second smart devices is controlled based on the control pattern information according to the groups.