Byron,
Would installing a lighting circuit, without a switch in your area contravene the Code?.
Personally what I would do if the lighting load is that large, is install a contactor in the panel, if there is room and like you said install a Master switch near the Panel.
I've never liked the idea of using a CB as a switch as they are designed to stay closed under normal conditions.
This topic did come up in the Non-US area a wee while back.
It is of my opinion that a CB is only designed as a circuit breaker, not an isolator, the increased operation of the mechanism may cause it an early death.
