Disinfecting light fixture
Disclosed herein is a light fixture. The light fixture includes at least one first light source that emits at a peak wavelength in a range of approximately 380 nm to approximately 420 nm and at least one second light source that emits at a different peak wavelength, wherein a combined light output of the at least one first light source and the at least one second light source emits a colored light that is perceived as white light. The white light is defined by having a color rendering index (CRI) value of more than approximately 50. The at least one second light source that emits at a different peak wavelength consists of an xy coordinate on a International Commission on Illumination (CIE) 1931 xy color space diagram above a black body curve within a bounded area defined by a first line of approximately y=2.23989x−0.382773 and a second line of approximately y=1.1551x−0.195082. The combined light output has a proportion of spectral energy measured in the approximately 380 nm to approximately 420 nm range of greater than approximately 20%.
1. A light fixture comprising:
at least one first light source that emits at a peak wavelength in a range of approximately 380 nanometers (nm) to approximately 420 nm;
at least one second light source that emits at a different peak wavelength, wherein a combined light output of the at least one first light source and the at least one second light source emits a colored light that is perceived as white light, and wherein the at least one second light source that emits at a different wavelength comprises a third light source and a fourth light source;
wherein the white light comprises a color rendering index (CRI) value of more than approximately 50;
wherein the at least one second light source that emits at a different peak wavelength consists of: an xy coordinate on a International Commission on Illumination (CIE) 1931 xy color space diagram above a black body curve within a bounded area defined by a first line of approximately y=2.23989x−0.382773 and a second line of approximately y=1.1551x−0.195082; and
wherein the combined light output has a proportion of spectral energy measured in the approximately 380 nm to approximately 420 nm range of greater than approximately 20%.
2. The light fixture of claim 1 , wherein the at least one first light source emits at a peak wavelength in the range of approximately 400 nm to approximately 410 nm.
3. The light fixture of claim 1 , wherein the white light comprises a CRI value of more than approximately 60.
4. The light fixture of claim 1 , wherein the white light comprises a CRI value of more than approximately 70.
5. The light fixture of claim 1 , wherein the white light further comprises a correlated color temperature (CCT) value between approximately 1000K and approximately 8000K.
6. The light fixture of claim 5 , wherein the white light comprises a CCT value between approximately 2000K and approximately 6000K.
7. The light fixture of claim 1 , wherein the at least one first light source that emits at a peak of approximately 380 nm to approximately 420 nm has an overall output sufficient to inactivate at least one pathogenic microorganism.
8. The light fixture of claim 1 , wherein the combined light output has an overall output containing a radiometric energy sufficient to inactive at least one bacterial population.
9. The light fixture of claim 1 , wherein the combined light output has a proportion of spectral energy measured in the approximately 380 nm to approximately 420 nm range of greater than approximately 25%.
10. The light fixture of claim 1 , wherein the combined light output has a proportion of spectral energy measured in the approximately 380 nm to approximately 420 nm range of greater than approximately 30%.
11. The light fixture of claim 1 , wherein the combined light output has a proportion of spectral energy measured in the approximately 380 nm to approximately 420 nm range of greater than approximately 35%.
12. The light fixture of claim 1 , wherein the combined light output has a proportion of spectral energy measured in the approximately 380 nm to approximately 420 nm range of at least approximately 40%.
13. The light fixture of claim 1 , wherein the third light source and the fourth light source emit visible light.
14. The light fixture of claim 1 , wherein the at least one second light source that emits at a different wavelength further comprises a fifth light source and a sixth light source.
15. The light fixture of claim 14 , wherein the fifth light source and the sixth light source emit visible light.
16. The light fixture of claim 1 , wherein the at least one first light source comprises a light emitting diode (LED).
17. The light fixture of claim 16 , wherein the at least one first light source comprises a primary emitter and a secondary emitter.
18. The light fixture of claim 17 , wherein the primary emitter comprises a light emitting diode (LED) and the secondary emitter comprises at least one of a group consisting of: a semiconductor material, a phosphor, a Yttrium-Aluminum-Garnet (YAG) phosphor, a semiconductor nanocrystal, and a quantum dot.
19. The light fixture of claim 1 , further comprising:
a control system, the control system configured to alter the combined light output.