There is provided a lighting device (100) comprising a first tubular body (120), a second tubular body (130) within the first tubular body (120), and a support structure within the first tubular body (120). The support structure supports a plurality of Solid State Lighting (SSL) elements (160) on a support surface, said SSL elements being arranged to emit light under a range of angles including a first range. The support structure is fixed within the first tubular body (120) by the first tubular body (120) and the second tubular body (130). The support structure comprises a tube receiving member (156) extending from the support surface, said tube receiving member engaging with the second tubular body (130).

The present invention provides a white light source comprising a light emitting diode having a light emission peak wavelength of 350 to 490 nm and a phosphor that emits visible light upon excitation by a light emitted from the light emitting diode; wherein, with respect to an arbitrary local maximum value of light-emission intensity between 350 and 780 nm of a light emission spectrum of the white light source, a ratio of a local minimum value of light-emission intensity that is closest on a long wavelength side to the local maximum value is such that, when the local maximum value is taken as 1, the local minimum value is 0.5 or more. It is preferable that, with respect to an arbitrary local maximum value of light-emission intensity between 350 and 780 nm of a light emission spectrum of the white light source, a ratio of a local minimum value of light-emission intensity that is closest on a long wavelength side to the local maximum value is such that, when the local maximum value is taken as 1, the local minimum value is 0.7 or more. According to the above structure, there can be provided a white light source capable of preventing a specified wavelength region from protruding in the light emission spectrum, and capable of visually perceiving the color tone of the irradiation object as the same state where the object is irradiated with sunlight.

A light emitting diode (LED) based illumination device include a plurality of LEDS mounted to mounting board and includes a transmissive plate disposed above the LEDs. The transmissive plate includes an amount of wavelength converting material configured to change a wavelength of an amount of light emitted by the plurality of LEDs. A base reflector structure is coupled to the LED mounting board and the transmissive plate between at least two of the LEDs. In another configuration, a dam of reflective material surrounds the LEDs and is coupled to the LED mounting board and the transmissive plate, while a dam of thermally conductive material surrounds the dam of reflective material. In another configuration, the LED mounting board has a protrusion of thermally conductive material that surrounds the LEDs and is coupled to the transmissive plate, and has a void on the side opposite the protrusion.

A method of manufacturing an LED lighting arrangement, comprises: receiving an optical component having a diffusing material that is light diffusive and at least one photoluminescent material that is excitable by light of a first wavelength range and which emits light of a second wavelength range; receiving an LED assembly that is operable to generate the light of the first wavelength range and mounting the optical component to the LED assembly to form the LED lighting arrangement. The optical component having the diffusing and photoluminescent materials is mass produced separately from the LED assembly and can be selected such that light generated by the optical component combined with the light generated by the LED assembly corresponds to light of a selected color. Also disclosed are LED lighting arrangements, components for LED lighting arrangements and methods of fabricating an optical component.

One or more light emitting diode diodes (LEDs) are attached to a printed circuit board. The attached LEDs are connectable with a power source via circuitry of the printed circuit board. An overmolding material is insert molded an over at least portions of the printed circuit board proximate to the LEDs to form a free standing high thermal conductivity material overmolding that covers at least portions of the printed circuit board proximate to the LEDs. The free standing high thermal conductivity material has a melting temperature greater than about 100 C. and has a thermal conductivity greater than or about 1 W/m.Math.K. In some embodiments, the free standing high thermal conductivity material is a thermoplastic material.

A method 100 of manufacturing a ceramic light transmitting barrier cell for enclosing a luminescent material and such a ceramic light transmitting barrier cell are provided. A part of a pre-formed barrier cell is formed 102 by providing a material mix comprising a binder and inorganic particles in a first mold. On the part is provided 104 a sacrificial layer for defining a cavity. A remainder part of the pre-formed barrier cell is formed 106 by providing the material mix in a second mold which already comprises the part with the sacrificial layer. The sacrificial layer is at least partially removed 112 to obtain the cavity. Optionally, the pre-formed barrier cell is heated 114, 116 (and/or sintered) to obtain the ceramic light transmitting barrier cell. The method 100 of manufacturing is suitable for producing at large scale relatively cheap and accurately formed ceramic light transmitting barrier cells.

A visible light spectrum and light source apparatus are described that provide over 80% of their total radiant flux power within the 385 nm-530 nm and the 570 nm-800 nm spectral ranges, collectively. The objective of the light spectrum and apparatus is to improve the visibility and shape of a wider range of objects than is practical using conventional LED white light sources at similar radiant flux power conditions. The new light source can provide good Scotopic or Mesopic at low power levels compared to most other light sources for illumination and improved differential photopic color-range vision. One illustrative embodiment of this new spectrum and light source provides a full visible light spectrum with at least 6% of the highest peak radiant power of all wavelengths between 405 nm-730 nm, and another illustrative embodiment provides a similar full spectrum between 440 nm and 730 nm. In both embodiments, the peak radiant power wavelength in the 475-510 nm cyan spectral region or the red 600-680 nm spectral peak is at least 1.1-times the lowest relative radiant flux power in the 530-570 nm spectral region.

The present disclosure discloses a method for providing protective coatings onto one or more surfaces of a frangible enclosure of an LED lamp and a lamp prepared therefrom. More particularly, the present disclosure relates to LED lamps comprising polymer coatings on at least one or more surfaces of an enclosure of an LED lamps.

A dual output headlight system includes a projection system having a laser light source to emit incoherent light. The projection system also has a partitioned display surface including a headlight display section and a selectively active augmented display section. The partitioned display surface is positioned in a first path of the incoherent light from the laser light source and to generate a display output. The dual output headlight system also includes an optical splitter positioned in a second path of the display output to split the display output into a headlight illumination output and a graphical output.

A lighting device has a base, an optic defining an optical chamber, a driver circuit positioned in electrical communication with the base, and a flexible circuit board positioned within the optical chamber along and generally circumscribing a longitudinal axis of the optical chamber and in electrical communication with the driver circuit. The flexible circuit board may comprise a plurality of longitudinal sections. Each longitudinal section may comprise a first inclined section, a second inclined section, and a plurality of light-emitting diodes (LEDs). The first inclined section may be positioned in the direction of the base relative to the second inclined section. The lighting device may further include a longitudinal translation device to translate longitudinally part of the flexible circuit board.