A pair of power vacuum tubes (electron tube) operating at full temperature and glowing in the dark. The orange glow is coming from the heater wire.

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Size: 5139px × 3429px
Photo credit: © Aphelion / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: amplification, amplifier, audio, blue, dark, electricity, electron, electronics, glow, glowing, guitar, heater, high, industral, infrared, kt-66, lighting, lit, object, power, royal, technology, tube, vacuum, valves, voltage