A student gave me a decoration that contains red, green, and blue LEDs that light up apparently randomly alone and together. I used an Ocean Optics USB2000 spectrometer with a fiber optic sensor to study the glow. The Overture software that I used has this cute feature that overlays colors on the visble light spectra. The emissions from each color of LED (red ~650 nm, green ~515 nm, and blue ~465nm) are quite clear in these spectra.
