I obviously cannot guarantee what will be on the box, but I'd be a bit surprised if the box did not 'boast' about additional switching capacity if it had it. For example, look at this. The fact that the specification (which might well be on the box) indicates a total switching capacity of 1000W, even though the fitting itself is only rated for a 100W lamp can be taken as a pretty sure indication that it has a switched live terminal.
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