A light emitting device includes a light emitting diode chip configured to emit first light having a peak wavelength of 400 nm to 470 nm; a wavelength conversion material converting a portion of the first light into second light having a peak wavelength of 620 nm to 670 nm; and a near-infrared phosphor configured to convert a portion of the first light into third light having a peak wavelength of 740 nm to 820 nm, wherein the near-infrared phosphor includes a phosphor represented by composition formula CaAl.sub.(12-x-y)Ga.sub.yO.sub.19:xCr.sup.3+, where x satisfies 0.1x0.3 and y satisfies 1 or more, and an emission spectrum of the third light alone has a ratio of an intensity of 690 nm relative to an intensity of 780 nm of 0.3 or less.

Systems, devices, and methods are disclosed herein for ultraviolet saunas. Systems include a plurality of walls of an enclosure, the enclosure being a sauna enclosure configured to accommodate a user. The systems further include a plurality of heating elements coupled to the plurality of walls, a plurality of emissive elements configured to generate ultraviolet (UV) light, and a controller coupled to the plurality of heating elements and the plurality of emissive elements. The controller includes one or more processors configured to generate activation properties for each of the plurality of heating elements and the plurality of emissive elements, activate at least one of the plurality of heating elements based on the plurality of activation properties, and activate the at least one emissive element based on the plurality of activation properties.

Lighting systems, methods, and devices for protecting human circadian neuroendocrine function during night use are described. Suitable lighting conditions can be provided for a working environment while protecting the circadian neuroendocrine systems of those occupying the illuminated workplace during the night. Lighting systems, methods, and devices can provide substantive attenuation of the pathologic circadian disruption in night workers. Lighting systems, methods, and devices can attenuate the specific bands of light implicated in circadian disruption. LED lighting systems, methods, and devices can provide increased intensity at a different portion of the spectrum than conventional LEDs, providing a useable white light even when unfavorable portions of the wavelength are attenuated by a notch filter. LED lighting systems, methods, and devices can switch between a daytime configuration and a night time configuration, wherein the daytime configuration provides unfiltered light and the night time configuration provides filtered light.

Systems and methods are provided for controlling infrared radiation (IR) sources of a sauna including tuning IR wavelength-ranges and radiated power-levels of IR sources, and directing IR to locations on a user's body. In one illustrative embodiment, a sauna may be provided having adjustable heat sources to emit IR at any wavelength resulting in a desirable radiation treatment for the sauna user. In another illustrative embodiment, a method is provided for tuning IR sources in a sauna.

A single-patient textile device for providing phototherapy treatment to a patient. The device includes a back wall intended to accommodate the patient in a supine position, the back wall having an upper portion and a lower portion; a front wall attached to the lower portion of the back wall; and two lateral walls which are arranged on either side of the back wall and can be folded onto the back wall. Once folded, the front wall and lateral walls form a volume to house the patient, including an opening to enable the passing of the patient's head through the upper portion of the back wall. The front wall can be folded toward the back wall such that the front wall and the back wall each have an inner surface that can distribute the treatment light within the volume.

Systems and methods for determining one or more temperatures within a phototherapy blanket use or include one or more temperature sensors and a set of light sources to determine a temperature of a subject undergoing phototherapy within the phototherapy blanket and estimate a core temperature of the subject based on, at least, the temperature. The phototherapy blanket may include a thicker region having a higher thermal insulation than one or more other regions of the phototherapy blanket. By virtue of measuring the temperature at or near the thicker region, the uncertainty in the relation between a temperature and the subject's core temperature may be reduced, for more accurate temperature determination within the phototherapy blanket.

The invention regards an apparatus for promoting D-vitamin production in a living organism, comprising at least one lamp assembly, said at least one lamp assembly is adapted to emit polychromatic light, wherein the polychromatic light at least emulates natural light and UV light at wavelengths between 270 nm and 315 nm.

The invention relates to a skin tanning chamber, the improvement comprising at least one light emitting diode emitting a UVA light, such as a UVA LED that emits essentially only UVA. Additionally, multiple LEDs of varying types with various characteristic wavelengths are controlled independently to produce an arbitrary light pattern in an arbitrary sequence over time. The chamber can be rigid or flexible. It can be a bed, booth or incorporated into a flexible form, such as a garment or cloth. In one embodiment, the chamber further comprises at least one LED emitting a UVC light, whereby the UVC light sanitizes the chamber surface. Preferably the LED emitting the UVA light is under independent control from the LED emitting UVC light.

Disclosed is a portable phototherapy device capable of emitting electromagnetic radiation of a wavelength and intensity sufficient to obtain a desired phototherapeutic effect to a subject, without being in direct physical contact with said subject. The device is portable, capable of being flattened, folded, rolled, compressed, or otherwise collapsed, to a size smaller than that of its operating size. The device may be of any size or shape, and may optionally comprise a frame support. The device may be powered by a variety of sources, including one or more batteries. The device may be configured to deliver electromagnetic radiation sufficient to obtain one or more of a variety of desired phototherapeutic effects.

A luminaire includes a frame, an ambient light source positioned within the frame adjacent a first end of the frame, a downlight light source positioned within the frame adjacent a second end of the frame, a diffuser connected to the frame and at least partially surrounding the ambient light source, and a reflector configured to direct light emitted by the downlight light source. A first driver is in electrical communication with the ambient light source and is configured to adjust the illuminance of the ambient light source. A second driver is in electrical communication with the downlight light source and is configured to adjust the illuminance of the downlight light source. A controller is in electrical communication with and send control signals to the drivers to change the light sources between a plurality of illuminance modes, which includes a circadian effective mode and a circadian ineffective mode.