Yup, Dapo AC21 is a fluorescent load rating. G.E. has very comprehensive tables of loading and switching specs for their contactors in their contactor catalogue. In my opinion you should just get contactors that are well over-rated for the task ( provided they fit in the board). If your contactors are for a boning room then there could be a considerable "down-time" cost to your customer. An extra couple of bucks for over-size contactors may be economically viable.
