The present invention relates to a lighting device including a light transmittable shell, a conductive unit and a light source. The light transmittable shell has an inner space and a mounting opening connected to the inner space. The light source is mounted around the mounting opening such that the LEDs in the light source are arranged along the edge of the mounting opening. The light from the light source transmits through the light transmittable shell from the edge of the mounting opening, leading to a glowing effect of the light transmittable shell, improving the lighting efficiency of the lighting device. Furthermore, the LEDs are distributed along the edge of the mounting opening and have direct contact with the flowing air in open space, so the heat-dissipation of the LEDs is effective enough without extra cooling components.

The present invention relates to a lighting device including a light transmittable shell, a conductive unit and a light source. The light transmittable shell has an inner space and a mounting opening connected to the inner space. The light source is mounted around the mounting opening such that the LEDs in the light source are arranged along the edge of the mounting opening. The light from the light source transmits through the light transmittable shell from the edge of the mounting opening, leading to a glowing effect of the light transmittable shell, improving the lighting efficiency of the lighting device. Furthermore, the LEDs are distributed along the edge of the mounting opening and have direct contact with the flowing air in open space, so the heat-dissipation of the LEDs is effective enough without extra cooling components.

The present invention relates to a lighting device including a light transmittable shell, a conductive unit and a light source. The light transmittable shell has an inner space and a mounting opening connected to the inner space. The light source is mounted around the mounting opening such that the LEDs in the light source are arranged along the edge of the mounting opening. The light from the light source transmits through the light transmittable shell from the edge of the mounting opening, leading to a glowing effect of the light transmittable shell, improving the lighting efficiency of the lighting device. Furthermore, the LEDs are distributed along the edge of the mounting opening and have direct contact with the flowing air in open space, so the heat-dissipation of the LEDs is effective enough without extra cooling components.

A cultivation apparatus for cultivating seedlings of Solanaceae plants equipped with a lighting device, wherein the lighting device has a light source that constitutes a spectrum showing a wavelength range A of 400 nm or more and less than 500 nm and a wavelength range B of 500 nm or more and less than 700 nm; wherein the photosynthetic photon flux density in the wavelength range A is 100 μmol/m.sup.2/sec or more; and wherein, when the total of the photosynthetic photon flux density in the wavelength range A and the photosynthetic photon flux density in the wavelength range B is 100%, the photosynthetic photon flux density in the wavelength range A is 70% or more and less than 99%.

A cultivation apparatus for cultivating seedlings of Solanaceae plants equipped with a lighting device, wherein the lighting device has a light source that constitutes a spectrum showing a wavelength range A of 400 nm or more and less than 500 nm and a wavelength range B of 500 nm or more and less than 700 nm; wherein the photosynthetic photon flux density in the wavelength range A is 100 μmol/m.sup.2/sec or more; and wherein, when the total of the photosynthetic photon flux density in the wavelength range A and the photosynthetic photon flux density in the wavelength range B is 100%, the photosynthetic photon flux density in the wavelength range A is 70% or more and less than 99%.

A heat generating device includes a heat generating portion, a first cover configured to cover at least part of the heat generating portion and including a first opening portion formed on one side and a second opening portion formed on the other side lying opposite to the one side, and a second cover disposed on an outer side of the first cover and forming a flow path leading from the first opening portion to the second opening portion, and in the heat generating device, a height from a lower end of the first cover to an opening center of the first opening portion is greater than a height from the lower end of the first cover to an opening center of the second opening portion.

An illumination apparatus includes a case, a plurality of oscillators configured to generate electromagnetic waves, and housed in the case and arranged two-dimensionally, a window unit configured to emit therefrom the electromagnetic waves, and disposed on a first side of the case, a plurality of inflow holes configured to allow fluid to flow into the case, and disposed at positions at which the electromagnetic waves from the window unit propagate, and a discharging unit configured to discharge the fluid, which has flowed into the case, out of the case, and disposed on a second side of the case, which is an opposite side to the first side. When the oscillator is viewed from the window unit, a part of the oscillator is located on an inner side of the inflow hole, and the fluid which has flowed into the case through the inflow hole reaches the oscillator.

A lighting system includes a plurality of lighting fixtures coupled to a cooling pipe, each lighting fixture having an open sided pipe coupling portion and a lighting member connected to the coupling portion. The lighting member being thermally coupled to an inside portion of the pipe coupling portion. The lighting member having a light emanating away from the cooling pipe.

A lighting system includes a plurality of lighting fixtures coupled to a cooling pipe, each lighting fixture having an open sided pipe coupling portion and a lighting member connected to the coupling portion. The lighting member being thermally coupled to an inside portion of the pipe coupling portion. The lighting member having a light emanating away from the cooling pipe.

A light fixture, preferably for stage, is provided with a source assembly configured to generate a light beam mainly along an emission direction; and with at least a first optical assembly arranged downstream of the source assembly along the emission direction; the first optical assembly comprising at least one mixing device configured to mix the light beam passing through it; the mixing device comprising an optical mixing element and a moving device configured to move the optical mixing element between a position of non-interference with the light beam emitted by the source assembly and at least one position of interference with the light beam emitted by the source assembly.