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It was David Krypton lamp.
Yes.
krypton-86 lamp
A combination of neon, argon, xenon, krypton, sodium, metal halide, and mercury.
The common fluorescent lamp is a low pressure mercury arc lamp.
Plasma globes or plasma lamps are filled with noble gases and a high voltage electrode. The most common gasses are neon, argon, xenon, and krypton.