A lighting apparatus includes a white light emitting device including a first light emitting diode and a wavelength converter including wavelength conversion substances to convert light of the first light emitting diode, and a second light emitting diode emitting light suitable for sterilizing at least one pathogenic microorganism, in which the first and second light emitting diodes emit light having a central wavelength in a range of about 300 nm to about 420 nm, and in a range of about 400 nm to about 420 nm, respectively, the lighting apparatus emits light generated in the white light emitting device and the second light emitting diode to the outside, and, in irradiance spectrum of the white light, an irradiance at the central wavelength of light emitted from the first light emitting diode is less than that at a peak wavelength of blue light emitted from a blue wavelength conversion substance.

A lighting system includes a light source configured to generate light to inactivate one or more pathogens. The light includes an inactivating portion. In one embodiment, a method for inactivating one or more pathogens and optionally concurrently illuminating a room having one or more human occupants while the pathogens are inactivated is also provided. The method includes generating light from a light source to inactivate the one or more pathogens. The light is generated with an inactivating portion of the light.

A method for the inactivation of viruses and/or bacteria by at least 50%, or the disinfection and sanitization from bacteria and/or viruses, in spaces, surfaces or objects uses an electromagnetic radiation having a wavelength comprised between 410 nm and 430 nm. In particular, it relates to irradiating the area to be disinfected or sanitized with an electromagnetic radiation having a wavelength comprised between 410 nm and 430 nm for a time interval between 5 minutes and 180 minutes, a power density comprised between 13 mW/cm.sup.2 and 120 mW/cm.sup.2 and an energy density comprised between 30 J/cm.sup.2 and 220 J/cm.sup.2. The electromagnetic radiation is irradiated at a distance between the source of the electromagnetic radiation and the irradiated space, surface or object between 30 centimeters to 1.5 meters.

A system and method of disinfecting an area using germicidal radiation. The system is configured to track person within the environment, and to control one or more germicidal radiation emitters based on user and sensor inputs, such as detecting whether the eyes are protected for the persons in this environment. The system is configured to intentionally and safely expose persons in the environment to germicidal radiation. This provides for safe, electronically controlled, direct decontamination of the surfaces, air, and persons in the environment.

Monolithic composite photocatalysts for fluid purification, chemical transformations, and surface sterilization are disclosed. The monolithic composite photocatalysts comprise a photoactive nanocrystal component and a non-photoactive porous support. Photocatalytic fluid purification systems that contact an impurity-containing fluid with the subject monolithic composite photocatalysts are also disclosed.

A contrast injector system includes one or more devices for reducing or eliminating risk of cross-patient contamination. In particular, the contrast injector system includes at least one of a sterilization device, vibration device, and illuminator device positioned on a component of the contrast injector system, where the sterilization device, vibration device, and/or illuminator device is in communication with a console of the contrast injector system. The sterilization device has an energy emitter positioned to emit energy to one or more components of the system. The vibration device is positioned on a component of the system so as to induce acoustic vibrations on a surface of such component. The illuminator device includes a light source positioned to illuminate a component of the system.

A light emitting device which inactivates microorganisms is disclosed. The light emitting device may include a flexible light emitting layer emitting a light; and a transparent or translucent layer over the flexible light emitting layer. The light may travel through and exit an exterior surface of the transparent or translucent layer, creating an exiting light. The exiting light exiting the transparent or translucent layer may have at least a portion thereof having a wavelength in a range of 380 to 420 nanometers, and may disinfect the exterior surface of the transparent or translucent layer. The light emitting device may be used alone to create a self-disinfecting high touch surface, e.g., on a door, or may be shaped to mate with other structure to create a disinfecting high touch surface.

Introducing ultraviolet (UV) light to interior portions of footwear alters the environment inside a shoe or other footwear to destroy microorganisms or inhibit their growth. Visible light can also be used to prevent further microorganism growth. Introducing forced air flow through the footwear removes dampness in and thereby deodorizes the footwear. A preferred embodiment comprises an adjustable shoe tree equipped with a UV germicidal light source and electronic safeguards that prevent appreciable leakage of UV radiation outside the shoe.

A light source for emitting emitted light having an SPD comprising: (a) a plurality of light emitters including at least one violet solid-state emitter; (b) at least one phosphor; wherein said light emitters and said at least one phosphor being configured such that: at least 25% of the power within the SPD is in the range 390-420 nm, and the emitted light has a chromaticity which is within a Duv distance of less than 5 points from the Planckian locus.

A method of inactivating harmful microorganisms of a filtration medium including pathogenic bacteria and viruses is disclosed which includes placing a predetermined quantity of a hybridized fluorescent silk on to a filtration medium, applying light for a predetermined amount of time to the placed quantity of the hybridized fluorescent silk, and passing a fluid through the medium, wherein the fluid is one of substantially air or substantially water,

wherein the hybridized fluorescent silk is one of KillerRed, SuperNova, KillerOrange, Dronpa, TurboGFP, mCherry, or any combination thereof.