Due to having poor distance vision and thus strong corrective lenses, I'm "blessed" with the ability to see the spectrum of a light source whenever I look at it from an angle. One thing I've particularly noticed is that blue LEDs in appliances and such seem to have two distinct blue peaks to their spectrum - that is, I see 2 offset copies of the light source's shape, both blue, but with one appearing considerably dimmer and probably close to the UV range.
All the information I can find online about blue LEDs seems to indicate I should just see a narrow spectrum around a single wavelength somewhere around 460-480 nm. Are these perhaps just white phosphor-based LEDs behind a blue filter that's transmitting both the original blue and part of the spectrum of the yellow phosphor? Or is something else going on?
