Bright anode tufting is readily seen in mercury arc rectifiers when the current load is high: -
Invented in 1902 by Peter Cooper Hewitt, a mercury-arc rectifier provides power for industrial equipment and high-voltage DC power transmission. It is an AC to DC converter. Today, the rectifiers are solid state diodes and thyristors. Mercury metal is expensive and toxic.
Anode tufts clump together and retain identity. The Sun is just a small anode on the cosmic scale, so its photosphere is packed with bright granulations, which are anode tufts: -
Red giant stars are large anodes, so lots of tufting isn't needed to carry electric current, hence why a red chromospheric anode glow dominates them: -