An LED lightbulb is disclosed. The LED lightbulb includes at least two sets of LEDs that emit two different color temperature light and that are located on a metal core printed circuit board. The combine intensity outputs of the at least sets of LEDs generate a selected corrected color temperature output. The corrected color temperature output is changed by rotating a diffusing unit with a conductive contact pad that engages contact tracks on color corrected temperature (CCT) buttons and thereby closing a circuit corresponding to a selected corrected color temperature output.

Various implementations disclosed herein include a lighting system that includes a power supply and a lighting fixture coupled to the power supply, the lighting fixture comprising a determined number of removable emitting surfaces, wherein the lighting system satisfies a target PPFD at a canopy of a plant bed having a specified area and a specified mounting height of the determined number of emitting surfaces above the canopy, the determined number of emitting surfaces is determined based on at least the target PPFD, the specified area, and the specified mounting height, a system wattage supplied by the power supply is determined based on at least the determined number, the target PPFD, the specified area, and the specified mounting height, and a spacing between each of the emitting surfaces is determined based on at least the determined number and the specified mounting height.

Various implementations disclosed herein include a lighting system that includes a power supply and a lighting fixture coupled to the power supply, the lighting fixture comprising a determined number of removable emitting surfaces, wherein the lighting system satisfies a target PPFD at a canopy of a plant bed having a specified area and a specified mounting height of the determined number of emitting surfaces above the canopy, the determined number of emitting surfaces is determined based on at least the target PPFD, the specified area, and the specified mounting height, a system wattage supplied by the power supply is determined based on at least the determined number, the target PPFD, the specified area, and the specified mounting height, and a spacing between each of the emitting surfaces is determined based on at least the determined number and the specified mounting height.

A recessed lighting fixture comprises a generally annular body having a central cavity in the form of a partially spherical socket. There is a lighting support member having a partially spherical exterior portion which is closely fitted within the partially spherical socket of the annular body. The lighting support member is pivotable relative to the annular body, but air flow between the partially spherical socket of the annular body and the partially spherical exterior portion of the lighting support member is substantially restricted. There may be a light source mounted to the lighting support member adj acent a bottom thereof. The light source may be a light-emitting diode.

A recessed lighting fixture comprises a generally annular body having a central cavity in the form of a partially spherical socket. There is a lighting support member having a partially spherical exterior portion which is closely fitted within the partially spherical socket of the annular body. The lighting support member is pivotable relative to the annular body, but air flow between the partially spherical socket of the annular body and the partially spherical exterior portion of the lighting support member is substantially restricted. There may be a light source mounted to the lighting support member adj acent a bottom thereof. The light source may be a light-emitting diode.

A channel system that includes a first channel section, a second channel section, and a hinge joint between the first and second channel sections is disclosed. The hinge joint allows the first channel section to fold against the second channel section for storage and shipping of the channel system. In one embodiment, the hinge joint itself includes a hinge member that extends between the two channel sections and bends hingedly to allow movement and two intermediate endcaps, which cap the channel sections on either side of the hinge joint. The hinge joint may be designed to “snap back” to a fully extended position. Mechanical securement structure may be added to the first channel section and the second channel section to improve force and retention during the “snap back” movement.

A channel system that includes a first channel section, a second channel section, and a hinge joint between the first and second channel sections is disclosed. The hinge joint allows the first channel section to fold against the second channel section for storage and shipping of the channel system. In one embodiment, the hinge joint itself includes a hinge member that extends between the two channel sections and bends hingedly to allow movement and two intermediate endcaps, which cap the channel sections on either side of the hinge joint. The hinge joint may be designed to “snap back” to a fully extended position. Mechanical securement structure may be added to the first channel section and the second channel section to improve force and retention during the “snap back” movement.

A light emitting module includes: a substrate; a first light source mounted on the substrate, the first light source comprising a first light emitting element configured to emit first light, a light reflecting member surrounding lateral faces of the first light emitting element, and a first wavelength conversion member configured to convert a wavelength of a portion of the first light and to emit second light, such that the first light source is configured to output light that includes the first light and the second light, the first wavelength conversion member covering the first light emitting element and extending out from the lateral faces of the first light emitting element when viewed from above; and a first lens on which the light output from the first light source is incident.

A lighting device includes a light permeable body which has an aperture through which light enters the body. A light source is moveable relative to the body to enable the lighting device to adopt selectively one of a first configuration and a second configuration. In the first configuration, the light source is positioned over the aperture so that light emitted by the light source passes through the body before illuminating the room. In the second configuration, the light source is spaced laterally from the aperture so that the room is illuminated directly by light emitted from the light source.

A lighting device includes a light permeable body which has an aperture through which light enters the body. A light source is moveable relative to the body to enable the lighting device to adopt selectively one of a first configuration and a second configuration. In the first configuration, the light source is positioned over the aperture so that light emitted by the light source passes through the body before illuminating the room. In the second configuration, the light source is spaced laterally from the aperture so that the room is illuminated directly by light emitted from the light source.