Granted, I've been out of it for several years, but I agree, what he wants doesn't exist. The inrush current for a strobe would be far exceed the capability of any reasonable battery in a single/multiple-station smoke.
He may be trying to apply stand-by requirements for "in-room" strobes connected to a hotel fire alarm system. From your description, I see a residential living unit where no "system" devices of any type are required; only single/multiple-station smokes.
Can you ask for specific code he is referencing "so you can make sure the get a suitable unit"? If he comes up will something, barring "local" amendments, you'll probably find it isn't even addressed. IIRC, UL217 does not address visual whatsoever.
I think your biggest problem will be how to educate this inspector. Have all appropriate code books ready with your references marked. I used to open with, "Man, has this been a learning experience!".