Abstract: A tunable lighting system includes a first LED having a first spectral output, a second LED having a second spectral output, and a correction circuit including a correction LED. The correction circuit in the tunable lighting system controls the correction LED to emit light that, when combined with light output from the first LED and light output from the second LED, produces a selected spectral characteristic.

Abstract: A tunable lighting system includes a first LED having a first spectral output, a second LED having a second spectral output, and a correction circuit including a correction LED. The correction circuit in the tunable lighting system controls the correction LED to emit light that, when combined with light output from the first LED and light output from the second LED, produces a selected spectral characteristic.

Abstract: A device for coupling to a heat source, the device includes thermoelectric elements and a coupling magnet. The thermoelectric elements harvest heat to generate electric current. The coupling magnet provides a coupling force between the thermoelectric elements and the heat source. The coupling magnet regulates thermal flow between the thermoelectric elements and the heat source as a function of temperature of the coupling magnet. The device acts to protect the thermoelectric elements and other associated components from heat damage that might otherwise occur if the heat source generates too much heat.

Abstract: An energy management system for controlling energy to one or more loads powered by a thermoelectric module, the system is comprised of a load prioritization circuit having a monitoring system interfaced to receive sensor data from at least one sensor. A data processing device receives the sensor data. The data processing device acts upon the sensor data to produce energy management instructions. A control system receives the energy management instructions using them to control energy to all loads.

Abstract: An illumination device used to replace fluorescent light tubes. The illumination device comprises an LED light strip, a diffusion tube surrounding the LED light strip, and an end cap mounted on each end of the tube. Electrical connectors integrated with the end caps and make electrical connection with the LED light strip. The device may be hermetically sealed, use LED's to rectify the current, have a filament simulator with or without a visual indicator, two-sided or multi-sided light strips, light diffusing end caps and be filled with a life-extending gas. The illumination device results in an LED light tube with improved lighting uniformity, reduced energy consumption, improved ease of use and longer operating life.

Abstract: An arrangement of a multiplicity of LEDs, drive circuitry, and supporting structure to form a replacement for standard fluorescent tubes without the need to rewire or remove the magnetic or electronic ballasts in use in standard fluorescent fixtures.