Versatile 4" Round aperture recessed LED downlight Illuminated by BIOS® to provide healthy, low energy lighting that promotes improved sleep, better health and well-being. Theses Spectrum Lighting fixtures are embedded with BIOS® SkyBlue® circadian solutions to produce the healthy “blue sky” light signal needed to stimulate human circadian biology. This specific light wavelength communicates directly with human biology through a non-visual photoreceptor to regulate circadian rhythms, providing healthier sleep patterns and ultimately, better health. BIOS® SkyBlue® lighting solutions is designed to provide the specific circadian stimulus required to improve overall sleep quality, allowing our bodies to better recover during the night. Having an improved circadian rhythm can positively impact daytime productivity and overall feelings of well-being.