In the past few years, we have covered plenty of neat plasma lamps here. The Can You Imagine Plasma Lightsaber is also worth a look. It is a battery powered plasma lamp that reacts to your touch. It can light up neon and other gases. You have the option to power it with an adapter.
More gadgets like this: here
⚡ Can You Imagine Plasma Lightsaber -- Gadgetify
This plasma lightsaber is not easy to find but your best bet is to search for it on auction sites.
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