The Grade 2 Infusions used Dawnlight Aethersands and the Grade 1 Infusions used Dusklight Aethersands. It was easy enough to navigate around the time gating on both by spearfishing in Ruby Sea (aetherial reduction from false scads etc gave the desired sands). But Duskglow doesn't really need that, since there's a Duskglow item in every ephemeral node.