I've never liked the idea of using a CB as a switch as they are designed to stay closed under normal conditions.
A circuit breaker that is UL listed as SWD has passed the same test procedures (including mechanical operations)as any standard light switch for tungsten and fluorescent loads. To my knowledge this Switching Duty rating is only available on 1-pole 15 & 20A breakers. There is a similar HID rating on larger ampacities and multi-pole breakers.
Many, if not most, commerical grade breakers (like the SQD QO and C-H CH) are SWD listed.
