The description of bright dust is as follows:
Obtained by completing certain bounties and from special reward sources.
Cosmetics from the Bright Dust seem to be rather pricey — I started playing New Light, and somehow started with 1500. Over a few weeks, I've only managed to grind about 1200 bright dust, and I'm not sure where I got those from. According to what I've found online, the event cosmetics only show up once per week, and I have to get an individual part specific to each class.
I don't have any DLC purchased (meaning no Forsaken or Shadowkeep), and I do not own the Battle Pass.
What options do I have in obtaining a large amount of Bright Dust?
Best Answer
A new guide (about 3 days old as I write this) suggests that the most efficient way to grind out bright dust is to run specific Crucible, Gambit, and Strike bounties. Old methods involving Bright Engrams are no longer viable since the Shadowkeep launch.
You can expect to earn around 200 per hour with the most efficient running possible.
A full data-mined list of the relevant bounties follows, copied from the guide: