Dichromatic phosphor-converted (pc) light-emitting diodes (LEDs) with low circadian action are proposed for low-luminance photobiologically safe outdoor illumination. The LEDs feature the partial… (More)
The circadian and visual-performance-based mesopic systems of photometry were applied for the optimization of the spectral power distributions (SPDs) of the solid-state sources of light for… (More)
A source of white light with continuously tuned color rendition properties, such as color fidelity, as well as color saturating and color dulling ability has been developed. The source, which is… (More)
We present an approach to the optimization of the trichromatic spectral power distributions (SPDs) of phosphor-converted (p-c) light-emitting diodes (LEDs) in respect of each of four different color… (More)
We report the sol-gel synthesis and characterization of far-red garnet phosphors Gd(3)Ga(5)O(12) (GGG:Cr), Y(3)Ga(5)O(12) (YGG:Cr), Lu(3)Ga(5)O(12) (LGG:Cr), and Gd(3)Sc(2)Ga(3)O(12) (GSGG:Cr) doped… (More)
A concept of a solid-state lighting engine for artwork-specific illumination with controlled photochemical safety is introduced. The engine is based on a tetrachromatic cluster of colored… (More)