Fluorescent lights

the light changes color with the gas that is introduced to it

the orange color has been created through the introduction of neon gas.

Helium light spectrum

with the super fancy glasses everything is all rainbow-y. The glasses are de-fraction grading glasses. they look similar to a cd and have very closely etched lines on the lenses. In the center you see the neon light then off to either side their are lines that gradually change color until it is a dark red with quite a few lines that are very vibrant. With the next light (Helium) it shows a spectrum starting with green and ending in a peach-orange color with a bright vibrant orange in the middle of the spectrum with a few more lines. The argon light shows a spectrum starting with a violet-blue and going to red. Nitrogen like the argon has a large spectrum but with many more lines of color than any until this point. Carbon dioxide has about as many lines as the nitrogen but some of the colors are much more vibrant (the pure colors).