The present invention concerns a lighting device comprising a source for generating electromagnetic radiation, and a beam shaper which is so arranged and adapted that in operation of the lighting device it spatially expands the electromagnetic radiation issuing from the source. In comparison therewith the object of the present invention is to provide such a lighting device which ensures eye safety even when the beam shaper is detached or damaged. For that purpose it is proposed according to the invention that the lighting device has a sensor which is so adapted that in operation of the lighting device it detects a state of the beam shaper, wherein the sensor and the source are so operatively connected together and adapted that if during operation of the lighting device the state of the beam shaper changes in such a way that electromagnetic radiation could issue from the lighting device without the beam shaper being in the beam path of the electromagnetic radiation the source is switched off.

The disclosure relates to a life prediction system for a fan of a lamp. The system comprises a fan signal detecting module to detect at least one working parameter of the fan; and a micro control unit to receive the working current signal, the environment temperature signal and the working rotation speed signal of the fan. The detecting module comprises a current detecting unit to detect a working current of the fan and output a working current signal; a temperature detecting unit to detect a working environment temperature of the fan and output an environment temperature signal; and a rotation speed detecting unit to detect and output a working rotation speed signal of the fan. The micro control unit calculates a predicted residual life of the fan based on the received working current signal, the environment temperature signal, the working rotation speed signal, through the life model of the fan.

A laser-based light source includes a laser device configured to generate laser light of a predetermined laser wavelength and emit this laser light as a laser beam. A light-conversion device is configured to convert at least part of the laser light into converted light and a laser-output sensor is configured to determine a laser-output signal proportional to the output of laser light emitted by the laser device. Further, a converted-light sensor is configured to determine a converted-light signal proportional to the output of converted light emitted by the light-conversion device. A controller is configured to receive the laser-output signal and the converted-light signal, to determine a safe-to-operate parameter, based on the laser-output signal and the converted-light signal, and to control the operation of the laser-based light source based on a comparison of the safe-to-operate parameter with a at least one predefined threshold.

An optical waveguide based side illuminating assembly having an elongated, side-emitting light waveguide, an optical protective coating surrounding the waveguide, an elongated base to which the waveguide is attached lengthwise along the elongated base, via the optical protective coating, a reflector between the optical protective coating and the elongated base and extending lengthwise along the base, and an elongated reinforcing structure embedded in the elongated base, or attached to an outer surface of the elongated base, and extending lengthwise along the elongated base. Other aspects are also described and claimed.

A luminaire control system comprising a plurality of luminaire heads and a remote device; wherein each luminaire head comprises: a sensor assembly for measuring at least one tilt angle for an angular positioning of the luminaire head, and a control module for controlling the sensor assembly to perform measurements during a first period upon activation of the luminaire head after installation thereof on a mounting base, and for controlling communication such that measurement data from said first period and an identification of the luminaire head is communicated to the remote device; wherein the remote device is configured to determine position information data for each luminaire head, based on the received measurement data, indicating whether the luminaire head is positioned correctly; and the luminaire control system further comprising at least one notification module for receiving the position information data from the remote device and for notifying a field operator accordingly.

Embodiments of the present disclosure relate to the fields of architectural lighting, backlit displays of fine art, graphic art and photographs, and architectural partitioning by using a Beam Penal which provides both direct lighting and diffused lighting, using a linear array of LEDs as light sources.

The present invention relates generally to the field of vehicle key fobs. More specifically, the present invention relates to a vehicle key fob device comprised of a vehicle key fob that has a housing, a flashlight, a biometric scanner, a plurality of LED-illuminated buttons/emblems and a button that allows the color of the LED-illuminated buttons to change. The fob may have a plurality of buttons in differing embodiments, which are preferably illuminated via at least one LED that is positioned below each button. However, in one embodiment a singular large LED may sit below all buttons to illuminate the buttons simultaneously. The at least one LED can also produce any color known in the art, which can be changed by a user by pressing a color change button located on the side surface of the fob.

A system for alerting motorists travelling on a roadway in a vicinity of a vehicle is disclosed. The system includes one or more projector units, and a respective attachment structure for each of the one or more projector units for attaching the projector units to a portion of the vehicle. The one or more projector units are configured and arranged to project a light signal on to at least a portion of the roadway adjacent the vehicle and in a travel path of the motorist. The one or more projector units include at least one light flare projector unit and/or at least one signage projector unit. A school bus incorporating the system is also disclosed. A method for alerting motorists travelling on a roadway in the vicinity of a vehicle is also disclosed.

Embodiments of the present disclosure relate to the fields of architectural lighting, backlit displays of fine art, graphic art and photographs, and architectural partitioning by using a Beam Penal which provides both direct lighting and diffused lighting, using a linear array of LEDs as light sources.

In one aspect, luminaires are described herein having sensor modules integrated therein. In one aspect, a luminaire described herein comprises a light emitting face including a LED assembly. A sensor module is integrated into the luminaire at a position at least partially overlapping the light emitting face. In another aspect, a luminaire described herein comprises a LED assembly and a driver assembly. A sensor module is integrated into the luminaire along or more convective air current pathways cooling the LED assembly or driver assembly.