There are plenty of cool plasma balls and tubes on the market but most of them require a bulky power adapter. This Butterfly Plasma Lamp can be powered by a power bank. It illuminates beautifully in dark rooms and reacts to touch and sound. This may be a tiny lamp but it can still light up a neon tube or small fluorescent bulb.
You will need a 5V power source to power this light. It measures 4.3 x 3 x 5.3″.