Z Glo is Discraft’s glow plastic, a Z-class base with a luminous fill. It’s a line in its own right, not a run, and six moulds are listed in it.
Glow plastics track their base minus a little: durable, on the stiff side, and grip is a step below plain Z. It’s the Discraft choice for night rounds.
Dyeing defeats the glow, so it’s the worst Discraft plastic to dye. And it isn’t as translucent as Z Line.