A solid-state lamp includes a first plurality of solid-state emitters that emit light at visible wavelengths and a second plurality of solid-state emitters that emit light at a safe ultraviolet wavelength, wherein the second plurality of solid-state emitters emit light at least when the first plurality of solid-state emitters emit light.

A surgical light system comprises several light sources configured to respectively generate a specific light field on at least one surgical site to generate a surgical light field, and a controller configured to control the several light sources such as to provide and adjust a brightness of the specific light fields. The surgical light field is divided into several adjacent sections, the several light sources are configured such that the sections are respectively covered by at least one of the specific light fields in order to have a resulting brightness, wherein the size of the at least one specific light field) correspond to the size of the covered section, and the controller is configured to control the light sources such that the resulting brightness of the sections is adjustable to a specific brightness.

A spotlight system for illuminating a film or stage environment comprises a spotlight for generating light; and at least one optical component couplable to the spotlight for producing at least one spatial light distribution, wherein the optical component and/or the spotlight has/have a memory in which information on the spatial light distribution producible by the optical component is stored.

A spotlight system for illuminating a film or stage environment comprises a spotlight for generating light; and at least one optical component couplable to the spotlight for producing at least one spatial light distribution, wherein the optical component and/or the spotlight has/have a memory in which information on the spatial light distribution producible by the optical component is stored.

A tube lamp including a light source including at least one string of light emitting diodes within a tube body; end caps having pin contacts on each end of the tube body; and driver electronics including a filament detector portion provided by a passive resistance capacitor (RC) circuit that simulates the filament load of a fluorescent lamp when installed into a ballast containing fixture. The tube lamp may also include a switch for selecting light characteristics for light emitted by the light source.

A tube lamp including a light source including at least one string of light emitting diodes within a tube body; end caps having pin contacts on each end of the tube body; and driver electronics including a filament detector portion provided by a passive resistance capacitor (RC) circuit that simulates the filament load of a fluorescent lamp when installed into a ballast containing fixture. The tube lamp may also include a switch for selecting light characteristics for light emitted by the light source.

Proposed is a home appliance that includes a cabinet defining an exterior of the home appliance; a reception space defined inside the cabinet and configured to receive objects in the reception space; a door configured to open/close an open surface of the reception space, the door having a viewing window provided at the door; a lamp configured to illuminate an inside of the reception space; a sensor assembly configured to output a knock-on signal based on detecting a user's knock; and a controller configured to turn on/off the lamp based on the knock-on signal output by the sensor assembly, wherein based on a present state of the home appliance corresponding to at least any one of a plurality of preset exceptional situations, the controller is configured to not turn on/off the lamp regardless of the knock-on signal being output.

Proposed is a home appliance in which a reception space defined in the home appliance can be seen from the outside without opening a door through a viewing window. In the home appliance, the viewing window is mounted to the door, and when a user knocks on the door, a knock input by the user is detected and the inside of the reception space is illuminated such that the inside of the reception space can be seen from the outside through the viewing window. Accordingly, a user can see the inside of the reception space by a simple motion without opening the door.

A method and apparatus to manipulate a perceived target material color by varying compositions of illumination with static perceived chromaticity is disclosed. An illumination source is configured to emit light at a first set of wavelengths with a first set of amplitudes to illuminate the target material. An observer perceives the emitted light to be at a predetermined chromaticity, and perceives light reflected from the illuminated target material to be at a first chromaticity. A control device switches the illumination source to emit light at a second plurality of wavelengths at a second plurality of amplitudes, which is perceived to the observer to be of the same predetermined chromaticity as before, while the light reflected from the illuminated target material is perceived to be of a different chromaticity.

A method and apparatus to manipulate a perceived target material color by varying compositions of illumination with static perceived chromaticity is disclosed. An illumination source is configured to emit light at a first set of wavelengths with a first set of amplitudes to illuminate the target material. An observer perceives the emitted light to be at a predetermined chromaticity, and perceives light reflected from the illuminated target material to be at a first chromaticity. A control device switches the illumination source to emit light at a second plurality of wavelengths at a second plurality of amplitudes, which is perceived to the observer to be of the same predetermined chromaticity as before, while the light reflected from the illuminated target material is perceived to be of a different chromaticity.