What are the Uses of Krypton?

Superman would probably prefer that we not use krypton since it tend to weaken him. Krypton is a gas which in earth’s atmosphere is 1 ppm (1 part per million parts). It’s primary use today is in fluorescent lighting in a mixture with the gas argon to produce a greenish yellow light. Since it is not cost effective to extract large quantities of the gas, it is not practical to apply for widespread use. For more information, look here: