A COB LED lighting lamp cooled by a liquid agent, in particular water, used for year-round illumination of the LED light of this lamp in a greenhouse of plants and includes a load-bearing and lighting component, having a cooling plate with three threaded mounting openings arranged transversely, the inner surface of which with channels for the cooling liquid flowing through it is permanently and tightly connected with a cover equipped with neodymium magnets magnetically connected to contacting neodymium magnets of holders fixing COB LED modules equipped with COB LED diodes and lenses, and a cooling subassembly situated above it, including a cooling fan and a water radiator placed thereon and detachably connected thereto. Both components being connected to each other by two connecting pipe sets, such that the upper connector of the pipe set is screwed into the threaded opening of the water chamber of this water radiator.

The invention provides a heat dissipating module configured to dissipate heat of at least one heating element of a projection device. The heat dissipating module includes a first radiator, a second radiator, a pipe, and at least one fan. The second radiator is disposed opposite to the first radiator. The heating element, the first radiator, and the second radiator are connected to each other through the pipe to form a loop. A working fluid is configured to be filled in the pipe, and the working fluid flows through the first radiator after flowing through the second radiator for heat exchange, and the working fluid flowing into the first radiator flows to the heating element for cyclic heat dissipation after heat exchange again through the first radiator. The fan is configured between the first radiator and the second radiator.

A light source comprises at least one light-emitting component, in particular a component emitting ultraviolet light and/or a semiconductor component, and a line system, through which a cooling fluid can flow in a flow direction, for controlling the temperature of the at least one light-emitting component, and also a first and a second cooling-fluid pressure sensor, which are arranged one after the other in the line system in the flow direction, and an electronics unit which is connected to the first and second cooling-fluid pressure sensors and configured to determine at least one diagnostic, control and/or regulating value on the basis of pressures captured by the first cooling-fluid pressure sensor and by the second cooling-fluid pressure sensor.

A light source comprises at least one light-emitting component, in particular a component emitting ultraviolet light and/or a semiconductor component, and a line system, through which a cooling fluid can flow in a flow direction, for controlling the temperature of the at least one light-emitting component, and also a first and a second cooling-fluid pressure sensor, which are arranged one after the other in the line system in the flow direction, and an electronics unit which is connected to the first and second cooling-fluid pressure sensors and configured to determine at least one diagnostic, control and/or regulating value on the basis of pressures captured by the first cooling-fluid pressure sensor and by the second cooling-fluid pressure sensor.

A vertical farming layer structure comprising: an underlying support for supporting a plurality of farmed plants; a light-reflective upper surface positioned above and facing the underlying support, the light-reflective upper surface being adapted to reflect light by diffuse reflection; and a plurality of light-emitting devices positioned between the underlying support and the light-reflective upper surface, each light-emitting device being positioned to emit light along a respective optical axis oriented towards the light-reflective upper surface such that light emitted from the light-emitting device is at least partially diffusely reflected off of the light-reflective upper surface to reach the plants supported on the underlying support.

A vertical farming layer structure comprising: an underlying support for supporting a plurality of farmed plants; a light-reflective upper surface positioned above and facing the underlying support, the light-reflective upper surface being adapted to reflect light by diffuse reflection; and a plurality of light-emitting devices positioned between the underlying support and the light-reflective upper surface, each light-emitting device being positioned to emit light along a respective optical axis oriented towards the light-reflective upper surface such that light emitted from the light-emitting device is at least partially diffusely reflected off of the light-reflective upper surface to reach the plants supported on the underlying support.

A vertical farming layer structure comprising: an underlying support for supporting a plurality of farmed plants; a light-reflective upper surface positioned above and facing the underlying support, the light-reflective upper surface being adapted to reflect light by diffuse reflection; and a plurality of light-emitting devices positioned between the underlying support and the light-reflective upper surface, each light-emitting device being positioned to emit light along a respective optical axis oriented towards the light-reflective upper surface such that light emitted from the light-emitting device is at least partially diffusely reflected off of the light-reflective upper surface to reach the plants supported on the underlying support.

A vertical farming layer structure comprising: an underlying support for supporting a plurality of farmed plants; a light-reflective upper surface positioned above and facing the underlying support, the light-reflective upper surface being adapted to reflect light by diffuse reflection; and a plurality of light-emitting devices positioned between the underlying support and the light-reflective upper surface, each light-emitting device being positioned to emit light along a respective optical axis oriented towards the light-reflective upper surface such that light emitted from the light-emitting device is at least partially diffusely reflected off of the light-reflective upper surface to reach the plants supported on the underlying support.

An improved light-emitting diode (LED) light fixture can include a circuit board, multiple LED clusters, and a master power controller. The LED clusters can be arranged on the circuit board and can include at least seven LEDs electrically connected in series and a regulator circuit. The LEDs of an LED cluster can be arranged such that one LED is located at a central point of the LED cluster and the remaining LEDs are arranged in a circular geometry around the center LED. The master power controller can be coupled to the circuit board and can be configured to control power provided to the LED clusters.