'light-duty' definitions:

Definition of 'light-duty'

(from WordNet)
adjective
Not designed for heavy work; "a light-duty detergent" [ant: heavy-duty]

Definition of 'light-duty'

From: GCIDE
  • light-duty \light-duty\ adj. not designed for heavy or demanding work; as, a light-duty detergent. Opposite of heavy-duty. [WordNet 1.5]