how do we use kryptonwhat products use Krypton

Krypton is a noble gas that's primary use is for lighting.
 The use of this gas in fluorescent lights tends to reduce the power consumption
significantly. It is also used in incandescent light bulbs in order to curb filament
evaporation. In magnetic resonance imaging (MRI), it is used to image a person's airways
(respiratory system). The bright lights produced by passing electricity through krypton
gas can be seen from as far as a 1000 ft, even during foggy conditions. The tendency of
this light to penetrate fog has resulted in its use in aircraft runways to navigate
aircrafts. Its use in slide and movie projectors is also quite common. It is also used
in the photographic flash, especially in high speed photography.  Among the various
krypton uses, its use to define a meter is perhaps the most important one. When
krypton-86 is heated, it tends to give off a clear, bright line of a reddish-orange
color. Scientists measure a meter as 1,650,763.73 times the width of this line produced
by krypton making it an important standard in the metric world.