A versatile air purification system is disclosed herein. The invention harnesses reflective light trapping components capable of circulating high-intensity visible and infrared radiation. Passing air absorbs a part of the energy in aerosols as viruses and bacteria. Excessive energy consequently induces denaturation of biomacromolecules and can trigger chemical and physical disinfection mechanisms to airborne pathogens. This technology is also compatible with various HVAC systems, like those of medical facilities, buildings, and vehicles, and can be utilized for other fluids too. The system can further be applied as a distinct, portable air purification apparatus.

A lighting array including one or more antimicrobial light segments configured to emit light sufficient to inactivate one or more microorganisms at a target surface may be installed within identified contamination zones of food or beverage preparation, processing, storing or packaging equipment or machinery. In an ice machine, for example, an array controller is configured for communication with an ice machine controller to receive ice machine status information signals. The status information signals are usable by the array controller to determine cycle, state, and/or usage information associated with the ice machine. The array controller may individually control activation of the one or more antimicrobial light segments based on the status information signals received from the machine controller to achieve inactivation of one or more microorganisms on target surfaces within the machine.

A method of inactivating one or more pathogens in an environment. The method includes providing light from at least one lighting element of a lighting device installed in the environment, the at least one lighting element configured to provide light toward a target area in the environment, the provided light having at least a pathogen-inactivating first component in a first range of wavelengths of 400 nanometers to 420 nanometers. The pathogen-inactivating first component of light produces an irradiance of at least 0.01 mW/cm.sup.2 as measured at a surface in the target area that is unshielded from the lighting device and located at a distance of 1.5 meters from an external-most luminous surface of the lighting device. Providing the light causes the one or more pathogens to be inactivated.

A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm to 420 nm and a fluorescent member including at least one fluorescent material that is excited by light from the light emitting element for light emission, wherein a mixture of light from the light emitting element and light from the fluorescent material has a correlated color temperature in a range of 2000 K to 7500 K as measured according to JIS Z8725, and the light emitting device has a spectral distribution in which, when the integral value over a wavelength range of 380 nm to 780 nm is normalized to 100%, the proportion of an integral value over a wavelength range of 380 nm to 420 nm is 15% or more, and the ratio a as defined by the expression (1) is 0.9 or more and 1.6 or less.

Disclosed herein is a multiple light emitter device which inactivates microorganisms. The device includes at least two light emitters and at least one light-converting material arranged to convert at least a portion of light from the light emitters. Any unconverted light emitted from the light emitters and converted light emitted from the at least one light-converting material mixes to form a combined light, the combined light being white. In one aspect, the light emitters include at least one blue light emitter and at least one violet light emitter. In another aspect, the light emitters include one blue light emitter and one emitter within the range of approximately yellow to infrared light.

A method of providing doses of light sufficient to deactivate bacteria throughout a volumetric space. The method includes: (1) receiving data associated with a desired illuminance level for the space, indicative of an estimated occupancy of the volumetric space over a pre-determined period of time, and indicative of dimensions of the space; (2) determining, based on the received data, an arrangement of one or more lighting fixtures in the volumetric space, the one or more lighting fixtures configured to at least partially emit disinfecting light having a wavelength of between 400 nm and 420 nm, and a total radiometric power to be applied via the one or more lighting fixtures to produce a desired power density at any exposed surface within the volumetric space during the period of time; and (3) installing the determined arrangement of one or more lighting fixtures in the volumetric space.

A light radiation device includes a housing, a substrate provided in the housing, and a light source mounted on the substrate. The light source includes a first light source including at least one first light source to emit first light having a blue wavelength band, a second light source including at least one second light source to emit second light having a ultraviolet wavelength band, and a control unit to control the first light source and the second light source such that the second light source sequentially emits the second light after the first light source emits the first light. A dose of the second light source is less than 1/10 of a dose of the first light source.

An illumination system for a lighting assembly comprises a light assembly configured to selectively illuminate an operating region in a surgical suite and a plurality of light sources positioned within the light assembly and configured to emit light. The system further comprises at least one imager configured to capture image data and a controller. The controller is configured to scan the image data in at least one region of interest for a shaded region and identify a location of the shaded region within the region of interest. The controller is further configured to control the light assembly to activate at least one of the light sources to emit light impinging on the shaded region within the region of interest.

A light emitting apparatus including a first light emitter including at least one first light emitting diode and a wavelength converter, and a second light emitter including at least one second light emitting diode, in which the first light emitting diode emits light having a central wavelength in a range of violet or blue, the second light emitting diode emits light having a central wavelength in a range of about 400 nm to 420 nm, the wavelength converter includes green and red phosphors to convert light of the first light emitting diode into the white light, in the white light, an irradiance of light emitted from the first light emitting diode is less than that from the red phosphor, and an irradiance of light emitted from the second light emitting diode is greater than that of the white light emitted from the first light emitter at the same wavelength.

The field of this invention is technology that supports and enhances natural face-to-face communication. Throughout the recent Pandemic, people have been adversely affected by the loss of real face-to-face human contact. The invention provides one or more safe ‘meeting spaces’ through which persons can talk to each other normally, without the risk of airborne pathogens passing between them. The meeting space of the invention offers no physical barrier such as glass, which would reduce the quality of communication and diminish the user experience. Persons may see and hear each other through the meeting space but pathogens cannot substantially pass through it. Various ways are provided that substantially destroy/inactivate/remove pathogens from the meeting space(s). Some embodiments are sustainable, carbon neutral and solar powered. Others are highly energy efficient. Further refinements create a pleasant environment for conversation and enhance the user experience.