You can use the map from the Bray.Tech website to check which ones you're looking for (don't forget to sign into your Bungie account for the ones accounted for) - https://bray.tech/maps/savathuns-throne-world
Be sure to have "Lucent Moths" checked in the map settings.
Note that some of them requires you do the 6-player Wellspring activity to grab them too.
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thats what i am using, they are just not spawning. ill go to the location that matches brayttech and they just arent there