User:Praseodymium-141/Krypton

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 * A brighter light results with more blue color than conventional incandescent lamps.
 * The sealed spark gap assemblies in ignition exciters in some older jet engines contain a small amount of krypton-85 to produce consistent ionization levels and uniform operation.
 * This release is usually not dangerous as krypton is chemically inert and disperses widely in the atmosphere but it can be detected by sufficiently sensitive equipment.
 * At the same time, that mixture would contain only 10% oxygen (rather than the normal 20%) and hypoxia would be a greater concern.