Abstract: Systems and methods of producing high quality temperature adjustable white light using six different colored LEDs is disclosed. In one embodiment the six LEDs are a Red (630 nm), an Amber (589 nm), a lime LED (568 nm), a green LED (540 nm) a cyan LED (505 nm) and a blue (430 nm). Optimal relative intensities of the RGBACL LED are calculated by solving a matrix relating the CIE tristimulus values Alternatively, optimum relative intensities may be calculated for two light sources lying on a line of constant CCT value, but on opposite sides of the Planckian locus. These relative intensities for each of the light sources are then retained and adjusted as a group to obtain a single white light source of the requested CCT value lying on the Planckian locus.

Abstract: An LED light engine that produces homogeneous light that may efficiently concentrated to a required degree of divergence is disclosed. In a preferred embodiment, a narrow beam angle LED light engine has a homogenous light field produced by of light emitting surface consisting of an array of LEDs and homogenized by a light mixer. A concentrating mirror further reduces the divergence of the light field. The light mixer is a pillow lens/micro lens light mixer. The light mixer has a magnetic mount attached to it, allowing it to be removably attached to a mounting pillar that includes a rare-earth magnet. In one embodiment, the light emitting surface is an RGBACL COB.

Abstract: Systems and methods of producing high quality temperature adjustable white light using six different colored LEDs is disclosed. In one embodiment the six LEDs are a Red (630 nm), an Amber (589 nm), a lime LED (568 nm), a green LED (540 nm) a cyan LED (505 nm) and a blue (430 nm). Optimal relative intensities of the RGBACL LED are calculated by solving a matrix relating the CIE tristimulus values Alternatively, optimum relative intensities may be calculated for two light sources lying on a line of constant CCT value, but on opposite sides of the Planckian locus. These relative intensities for each of the light sources are then retained and adjusted as a group to obtain a single white light source of the requested CCT value lying on the Planckian locus.

Abstract: Assemblies of temperature monitored, semiconductor light emitting diodes (LEDs) are disclosed that produce color temperature adjustable white light sources. Warm-white LEDs are combined with green and blue LEDs to produce light have continuous spectrum spanning the wavelength range of 400 to 700 nm with a white light point located at a selectable Planckian locus location and a color rendering index greater than 80. The circuitry includes LED temperature monitoring used to adjust LEDs spectral and luminosity output. Alternate arrangements combine warm-white LEDs with green, blue and red LEDs; warm-white and cool-white LEDs with green, blue and red LEDs; warm-white and cool-white LEDs with green LEDs; and a warm-white and cool-white LEDs with green-white LEDs.