Warning lights using dominantly visible violet light to induce fluorescence in photoluminescent materials

A method for outputting different colors of light from a warning device comprising steps of:

• providing a plurality of light sources for emitting light of different colors, wherein one of said different colors of light emitted is violet having a first peak wavelength along a first range of wavelengths, and one or more other of said different colors is non-violet along a spectrum of visible illumination to human eyes;
• activating at least one of said plurality of light sources emitting light of said one or more other of said different colors to provide visible warning signals via a lens;
• and
• activating at least one of said plurality of light sources emitting light of said one of said different colors, via at least said lens, to provide fluorescence inducing signals for photoluminescent materials having a second peak wavelength along a second range of wavelengths, wherein in response to passing through at least said lens said second range of wavelengths is of higher wavelengths, dominantly along the spectrum of visible violet illumination to human eyes, than said first range of wavelengths, and said second peak wavelength is higher than said first peak wavelength.

A warning light comprising:

• a housing;
• one or more circuit boards in said housing having at least a plurality of light sources for emitting light of different colors, wherein one of said different colors is violet, and one or more other of said different colors is non-violet along a spectrum of visible illumination;
• a lens disposed along a front of said housing which shifts a dominant wavelength of the light from at least one of said plurality of light sources emitting light which is violet, and said lens being predominantly non-shifting in wavelength of the light from at least one of said plurality of light sources emitting light which is non-violet;
• and
• a controller along one of said one or more circuit boards for activating said plurality of light sources, in which at least one of said plurality of light sources emitting light which is violet when activated by said controller provides fluorescent inducing illumination which causes any objects or surfaces having phosphors to fluoresce.

A warning light outputting different colors of light comprising:

• a plurality of light sources for emitting light of different colors, wherein one of said different colors of light emitted is violet having a first peak wavelength along a first range of wavelengths, and one or more other of said different colors is non-violet along a spectrum of visible illumination to human eyes;
• a lens and a filter disposed between said lens and at least those ones of said light sources emitting violet light;
• and
• a controller for activating at least one of said plurality of light sources emitting light of said one or more other of said different colors to provide visible warning signals via at least said lens, and activating at least one of said plurality of light sources emitting light of said one of said different colors, via said lens and said filter, to provide fluorescence inducing signals for photoluminescent materials having a second peak wavelength along a second range of wavelengths, wherein in response to passing through one or more of said lens and said filter said second range of wavelengths is of higher wavelengths, dominantly along the spectrum of visible violet illumination to human eyes, than said first range of wavelengths, and said second peak wavelength is higher than said first peak wavelength.