A light irradiation device includes a first light source emitting first light in a visible wavelength band and a second light source emitting second light, in which at least part of a wavelength band is different from a wavelength band of the first light source and which catalyzes synthesis of a functional substance in a target to which light is applied. The second light includes light in a wavelength band of ultraviolet B.

A system is provided for treating a skin surface of a user, comprising: at least one light emitting source configured to focus light on a specified skin region of the user, the light being configured to treat a skin condition of the user; and a controller configured to control emission of the light onto the specified skin region of the user.

It is an object of the invention to provide an improved control system (10) for adapting a light recipe in a growing cycle of at least one boar (40), so as to delay sexual maturation of said at least one boar, which at least alleviates the problems and disadvantages related to boar taint. Thereto, the invention provides a control system for adapting a light recipe (21) in a growing cycle of at least one boar to delay sexual maturation of said at least one boar, wherein the control system comprises a controller (11) configured to: control a lighting device (20) to illuminate the at least one boar with said light recipe; obtain a first signal indicative of a sexual maturation level of the at least one boar; control, upon determining that the sexual maturity level of the at least one boar exceeds a predefined sexual maturity level, the lighting device to adapt said light recipe by (i) increasing a blue content of a spectrum of said light recipe, (ii) increasing a length of a photo-period of said light recipe, and/or (iii) increasing a light intensity of said light recipe.

A light supply method and a light supply system for phototherapy are provided. The light supply method includes the following. A plurality of light emitting modules of a light source device are driven so that a light source device outputs a first light. The first light is sensed by a light sensing module. A light parameter corresponding to best physiology of a user is received. A light output ratio of the light emitting modules is adjusted based on the light parameter, thereby adjusting the first light to a second light. The light emitting modules respectively have different central wavelengths. A half-height width of a plurality of spectra of the light emitting modules is less than 30 nanometers.

A light based therapy helmet has a circuit board layer which is equipped with multiple lighting dots. Each of the multiple lighting dots respectively is a first, a second or a third light-emitting unit. The first, the second and the third light-emitting units respectively emit a light of a first, a second and a third light band which respectively include a wavelength of 660 nm, 940 nm and 1600 nm. A lower helmet body is provided with an accommodation space configured for a user's head to be accommodated directly. An upper helmet body is provided with an accommodation space that fits the circuit board layer. When the lower helmet body, the circuit board layer, and the upper helmet body fit together, the circuit board layer is fixed between the upper helmet body and the lower helmet body. A controller controls the on/off and the brightness of the multiple lighting dots.

Photobiomodulation therapy (PBMT) can be applied to a tender area on a subject's body to treat fibromyalgia. A light source device can be contacted to a subject's skin proximal to a tender area on the subject's body. A light signal (with wavelengths from the red to infrared part of the spectrum) can be applied in at least one of a pulsed operating mode, a continuous operating mode, and a super-pulsed operating mode through the light source device to the tender area. The light signal is applied for a time sufficient to stimulate a phototherapeutic response in the tender area to treat fibromyalgia.

A nerve in a mammal is optogenetically transduced, wherein the nerve is susceptible to stimulus by selective application of transdermal light, and a light source is applied to dermis of the mammal at or proximate to the optogenetically transduced nerve, to thereby stimulate the nerve. A wearable device for optogenetic motor control and sensation restoration of a mammal includes a wearable support, a power source at the wearable support, a controller at the wearable support and in electrical communication with a power source, and a transdermal light source coupled to the controller.

Methods of treating skin disorders are disclosed. The methods involve impinging light having a first peak wavelength on the tissue at a first radiant flux, wherein the first peak wavelength and the first radiant flux is selected to provide an anti-inflammatory effect, and impinging light having a second peak wavelength on the tissue at a second radiant flux, wherein the second peak wavelength and the second radiant flux are selected to either stimulate enzymatic generation of nitric oxide to increase endogenous stores of nitric oxide or release nitric oxide from the endogenous stores are disclosed. Representative skin disorders include pruritus, psoriasis, acne, rosacea, and eczema, and the skin can include the scalp. The methods can reduce stinging and/or itching associated with the skin disorder. The anti-inflammatory wavelengths can be in the range of between about 650 and about 680 nm.

This present invention and its embodiments relates to methods for reducing pain during photodynamic therapy of actinic keratosis. The present invention also relates to methods of treating actinic keratosis with reduced pain during photodynamic therapy of actinic keratosis.

A spectral power distribution (SPD) fusion lighting apparatus includes a first visible light source with a first SPD, a second visible light source with a second SPD, a driver circuit, and a controller. The first SPD is different than the second SPD markedly in a 50 nm wavelength range. The controller toggles the turning on of the first visible light and the second visible light at a frequency greater than 25 Hz. The first visible light source is turned on during one half of the duty cycle, whereas the second visible light source is turned on during the other half of the duty cycle. The first visible light source and the second visible light emit similar light outputs and have similar chromaticity coordinates on the CIE 1931 color space chromaticity diagram. In some embodiments a sound wave generator is used to generate a sound wave at the same frequency.