Imaging & Setup
This photo was captured on a Canon EOS R50 with an RF 50 mm f/1.8 STM lens at ~0.3 m, f/8, 1/40 s, and ISO 10,000. Post-processing in Luminar Neo enhanced contrast and preserved the characteristic neon-red and argon-violet tones.

Physical Phenomena
The image depicts a cold, weakly ionized, non-equilibrium plasma sustained by a high-frequency RF field applied to a central electrode. Electrons in the neon–argon mixture are accelerated to energies sufficient for collisional ionization at streamer heads, while radiative recombination produces the visible redish-violet glow along the filaments.