A UV C light source including a UV C bulb adapted to emit and project UV C light at a wavelength and an interchangeable UV C light modifier through which at least a portion of the UV C light emitted from said UV C bulb is projected. The UV C light modifier may be reflective, such as a reflector, perforated, holographic material, or mechanical modifier such as a barn door. The UV C light modifier might produce a narrow pattern, circular pattern, flat pattern, or asymmetrical pattern or other desired geometric pattern, or upper air pattern. The UV C light modifier is easily removed and interchanged or may be selectable such as by receiving a base UV C fixture including the UV C light source of the present invention and selecting a desired light modifier.

A UV C light source including a UV C bulb adapted to emit and project UV C light at a wavelength and an interchangeable UV C light modifier through which at least a portion of the UV C light emitted from said UV C bulb is projected. The UV C light modifier may be reflective, such as a reflector, perforated, holographic material, or mechanical modifier such as a barn door. The UV C light modifier might produce a narrow pattern, circular pattern, flat pattern, or asymmetrical pattern or other desired geometric pattern, or upper air pattern. The UV C light modifier is easily removed and interchanged or may be selectable such as by receiving a base UV C fixture including the UV C light source of the present invention and selecting a desired light modifier.

A Far UV radiation system including a Far UV radiation source and a high pass filter. The high pass filter having a cutoff wavelength of 234 nm-237 nm when measured at an incidence angle of zero degrees and adapted to substantially reduce UV C radiation emitted from the Far UV radiation source so that the Far UV radiation system does not emit substantial UV radiation in wavelengths longer than 240 nm. The Far UV radiation system may be adapted to substantially reduce UV C, UV B, and UV A radiation from the Far UV radiation source.

A Far UV radiation system including a Far UV radiation source and a high pass filter. The high pass filter having a cutoff wavelength of 234 nm-237 nm when measured at an incidence angle of zero degrees and adapted to substantially reduce UV C radiation emitted from the Far UV radiation source so that the Far UV radiation system does not emit substantial UV radiation in wavelengths longer than 240 nm. The Far UV radiation system may be adapted to substantially reduce UV C, UV B, and UV A radiation from the Far UV radiation source.

An embodiment provides method for controlling lamp output within an array of lamps, including: receiving sensor data corresponding to one of a plurality of lamps within the array, wherein the sensor data comprises an irradiance value from at least one of: within a lamp sleeve and an irradiance value from outside a lamp sleeve; identifying, based the sensor data, a change in an output of the one of the plurality of lamps; sharing the sensor data with other of the plurality of lamps within the array; and adjusting, in response to the sharing, an output of at least one of the other of the plurality of lamps within the array, thereby compensating for the change in the output of one of the plurality of lamps. Other aspects are described and claimed.

An embodiment provides method for controlling lamp output within an array of lamps, including: receiving sensor data corresponding to one of a plurality of lamps within the array, wherein the sensor data comprises an irradiance value from at least one of: within a lamp sleeve and an irradiance value from outside a lamp sleeve; identifying, based the sensor data, a change in an output of the one of the plurality of lamps; sharing the sensor data with other of the plurality of lamps within the array; and adjusting, in response to the sharing, an output of at least one of the other of the plurality of lamps within the array, thereby compensating for the change in the output of one of the plurality of lamps. Other aspects are described and claimed.

A powering device is configured to provide power to an ultraviolet (UV) lamp of a sanitizing system. The powering device includes a power delivery assembly configured to provide power to the UV lamp, and a power controller coupled to the power delivery assembly. The power controller is configured to control one or more aspects of the power provided from the power delivery assembly to the UV lamp.

A powering device is configured to provide power to an ultraviolet (UV) lamp of a sanitizing system. The powering device includes a power delivery assembly configured to provide power to the UV lamp, and a power controller coupled to the power delivery assembly. The power controller is configured to control one or more aspects of the power provided from the power delivery assembly to the UV lamp.

Provided is a circuit for controlling a level of brightness of a light electrically coupled to a dimming circuit including control leads configured to provide a dimming control voltage to the dimmable driver, the dimming control voltage having a permissible voltage range. The circuit includes a photo sensor for detecting an ambient light level in the vicinity of the light and a clamp controller for selectively reducing the dimming control voltage to a clamped voltage range less than the permissible voltage range. Also included is a feedback controller for adjusting the dimming control voltage in response to a detected ambient light level, the dimming control voltage being within the clamped voltage range.

Provided is a circuit for controlling a level of brightness of a light electrically coupled to a dimming circuit including control leads configured to provide a dimming control voltage to the dimmable driver, the dimming control voltage having a permissible voltage range. The circuit includes a photo sensor for detecting an ambient light level in the vicinity of the light and a clamp controller for selectively reducing the dimming control voltage to a clamped voltage range less than the permissible voltage range. Also included is a feedback controller for adjusting the dimming control voltage in response to a detected ambient light level, the dimming control voltage being within the clamped voltage range.