Positive air pressure is applied on a ventral side of a plant canopy and negative air pressure is applied on a dorsal side of the plant canopy. By this arrangement, the negative air pressure draws air supplied by the positive air pressure on the ventral side of the plant canopy across the plant canopy past the dorsal side of the plant canopy to withdraw heat from the plant canopy, for example, from an agricultural lighting system and/or humidity from plant respiration in a controlled indoor environment.

Positive air pressure is applied on a ventral side of a plant canopy and negative air pressure is applied on a dorsal side of the plant canopy. By this arrangement, the negative air pressure draws air supplied by the positive air pressure on the ventral side of the plant canopy across the plant canopy past the dorsal side of the plant canopy to withdraw heat from the plant canopy, for example, from an agricultural lighting system and/or humidity from plant respiration in a controlled indoor environment.

The T-bar includes an elongate rigid spine extending between terminal ends including either a fixed anchor or adjustable anchor for attachment to adjacent T-bars or other supports. An upper heat sink is provided on an upper portion of the spine to enhance heat transfer from the T-bar to air surrounding upper portions of the T-bar. A light housing is provided on a lower portion of the T-bar which is configured to support a lighting module therein, such as a light emitting diode (LED) light. A lower heat sink is provided above this light housing and integrated into a rest shelf which supports ceiling tiles adjacent the T-bar. A power supply is provided which can be removably attached to the T-bar and provide appropriately conditioned power for the lighting module.

The T-bar includes an elongate rigid spine extending between terminal ends including either a fixed anchor or adjustable anchor for attachment to adjacent T-bars or other supports. An upper heat sink is provided on an upper portion of the spine to enhance heat transfer from the T-bar to air surrounding upper portions of the T-bar. A light housing is provided on a lower portion of the T-bar which is configured to support a lighting module therein, such as a light emitting diode (LED) light. A lower heat sink is provided above this light housing and integrated into a rest shelf which supports ceiling tiles adjacent the T-bar. A power supply is provided which can be removably attached to the T-bar and provide appropriately conditioned power for the lighting module.

An illumination device includes a first light-emitting module, a second light-emitting module and an airflow-guiding structure. The second light-emitting module is adjacent to the first light-emitting module. The airflow-guiding structure includes a receiving casing, a first air inlet pipe in air communication with the receiving casing, and a first air outlet pipe in air communication with the receiving casing. The first light-emitting module is received inside the airflow-guiding structure. When external air flows into the receiving casing through the first air inlet pipe by natural convection, the external air inside the receiving casing is sterilized by a sterilization light source provided by the first light-emitting module, and the external air that has been sterilized by the sterilization light source flows out of the receiving casing through the first air outlet pipe by natural convection, and is then discharged out of the illumination device.

The T-bar includes an elongate rigid spine extending between terminal ends including, in some embodiments, either a fixed anchor or adjustable anchor for attachment to adjacent T-bars or other supports. An upper heat sink is provided on an upper portion of the spine to enhance heat transfer from the T-bar to air surrounding upper portions of the T-bar. A light housing is provided on a lower portion of the T-bar which is configured to support a lighting module therein, such as a light emitting diode (LED) light. A lower heat sink is provided above this light housing and integrated into a rest shelf which supports ceiling tiles adjacent the T-bar. A power supply is provided which can be removably attached to the T-bar and provide appropriately conditioned power for the lighting module.

The T-bar includes an elongate rigid spine extending between terminal ends including, in some embodiments, either a fixed anchor or adjustable anchor for attachment to adjacent T-bars or other supports. An upper heat sink is provided on an upper portion of the spine to enhance heat transfer from the T-bar to air surrounding upper portions of the T-bar. A light housing is provided on a lower portion of the T-bar which is configured to support a lighting module therein, such as a light emitting diode (LED) light. A lower heat sink is provided above this light housing and integrated into a rest shelf which supports ceiling tiles adjacent the T-bar. A power supply is provided which can be removably attached to the T-bar and provide appropriately conditioned power for the lighting module.

A lighting control device for influencing thermoregulation of a vertebrate is disclosed. In one example, the lighting control device configured to select, on the basis of a predetermined criterion, a particular group of colors of groups having been categorized into groups on the basis of dominant wavelength, where each group of colors is arranged to influence a vertebrate's thermoregulation in a particular manner, and configured to generate a control signal for controlling the dominant wavelength of light emitted from at least one light source in accordance with the selected group of colors. The lighting control device is configured to transmit the generated control signal to said at least one light source for said at least one light source to emit light of the selected group of colors, thereby influencing the thermoregulation of the vertebrate being exposed to the light on the basis of said predetermined criterion.

A lighting control device for influencing thermoregulation of a vertebrate is disclosed. In one example, the lighting control device configured to select, on the basis of a predetermined criterion, a particular group of colors of groups having been categorized into groups on the basis of dominant wavelength, where each group of colors is arranged to influence a vertebrate's thermoregulation in a particular manner, and configured to generate a control signal for controlling the dominant wavelength of light emitted from at least one light source in accordance with the selected group of colors. The lighting control device is configured to transmit the generated control signal to said at least one light source for said at least one light source to emit light of the selected group of colors, thereby influencing the thermoregulation of the vertebrate being exposed to the light on the basis of said predetermined criterion.

A system for control of conditioned air within a space includes a distribution hub connected to provide conditioned air, fresh air, or a combination thereof to the space, and to exhaust and/or return air from the space through the distribution hub, and a controller coupled to the distribution hub to control the provision of the conditioned air and the fresh air, and to control removal of the return air.