The noun 'standard' is a singular, common noun; a word for a thing.
The word 'standard' is also an adjective.
There is no standard collective noun for a group of reflections. The noun 'reflection' is not a standard collective noun.
Standard can be a noun or an adjective. As a noun: "The restaurant offers a high standard of service." As a verb: "The standard rate is too high!"
No, the noun 'industry' is not a standard collective noun. There is, however, a standard collective noun for the noun 'industry': a blight of industry.
The noun 'belt' is a standard collective noun for a belt of asteroids.The is no standard collective noun for a group of belts.
There is no standard collective noun for a group of constellations. The noun 'constellation' is a standard collective noun for 'a constellation of stars'.
There is no standard collective noun for lotuses (or Lotuses).The standard collective noun for flowers can be used: a bouquet of lotusesThe standard collective noun for cars can be used: a fleet of Lotuses
There is no standard collective noun for the noun 'works'.
There is no standard collective noun for the noun tube. A collective noun is an informal part of speech. When there is no standard collective noun, a noun that suits the situation can be used.
The noun 'feast' is a standard collective noun for 'a feast of brewers'.
There is no standard collective noun for a group of solos.
The noun 'staff' is a standard collective noun for a staff of employees.
The noun 'cornucopia' is a standard collective noun for a cornucopia of slugs.