141019 Orbs with flash.
These pics were taken seconds apart, 1st with no flash, 2nd with flash... dust floating by.
I see the same inside the Chicken coop. Natural light, no dust orbs, with infra-red nite lite (simulates a flash) TONS of dust orbs. And we don't see it, but we breathe all this dust all day every day.
(Some serious remodeling at my Daughters house).